Which conditions unlock Origin and Cosmic Genome?
Check the skin entry before starting the challenge so you know exactly which run you are attempting. Mew Origin asks for a Nightmare victory using Mew. Mewtwo Cosmic Genome adds a second requirement: Psystrike must account for at least 40% of total damage in the winning Nightmare run. A successful run with a different companion, a different difficulty, or an insufficient Psystrike share does not match those stated conditions.
This guide concerns the skin challenges after you have access to the relevant companions. Unlocking Mew or Mewtwo as a playable choice is a separate objective covered by the existing character unlock pages. Keeping the two tasks separate saves wasted attempts. First confirm that you can select the companion, then prepare a run that meets the skin entry. Read the current entry if an update changes its wording; the screenshots below document the reviewed requirements.
| Legendary skin | Required companions and difficulty | Additional requirement |
|---|---|---|
| Origin | Mew; win Nightmare | No damage-share condition is shown |
| Cosmic Genome | Mewtwo; win Nightmare | Psystrike deals at least 40% of total run damage |
What should a Mew Origin attempt prioritize?
For Mew, the reviewed condition is straightforward: complete the Nightmare win with Mew. Plan around reaching and finishing the victory sequence rather than borrowing Mewtwo's special damage restriction. You do not need to deliberately weaken other attacks merely because that technique appears in a Cosmic Genome guide. The restriction belongs to a different skin entry, so applying it to Mew can make the attempt harder without answering the stated requirement.
Use the failure point from the previous run to guide your next choice. If the run ended because you could not survive, consider the survival and movement decisions that could keep it going. If progression stalled because attacks did not cover the enemies, address reliable coverage. Those are practical recommendations for completing the win, not extra Origin unlock conditions. Judge each adjustment by whether it helps the actual Nightmare objective you are trying to finish.
Why does the Mewtwo plan prioritize Psystrike?
Cosmic Genome depends on a share of total damage, so stronger secondary attacks can make the required percentage harder to maintain even while increasing your overall output. The approved approach is to prioritize maxing Psystrike, learn other moves only at level 1, and then banish their later upgrade cards. This keeps those moves available while limiting the further damage growth that would compete with Psystrike's share.
The order matters. Learn the other move first if you intend to keep its basic utility, then block later upgrades. Do not interpret “banish the upgrades” as “the move disappears.” For PokéBonk legendary skins, this distinction turns a vague instruction to use fewer attacks into a controllable plan: develop the required damage source, keep secondary moves modest, and avoid strengthening them out of habit when a level-up card appears.
What does banishing actually change?
Banishing prevents the selected future upgrade from continuing to appear in the way described by the reviewed guide. It does not roll back levels you already learned, and an existing move remains in your kit. If a secondary move has already been upgraded, banishing its later options can stop further growth, but it cannot return that move to level 1. Plan the restriction early enough that it can do the job you need.
If you do not have enough banishes for the intended plan, the guide recommends improving the relevant capability in the laboratory before another attempt. It does not specify a universal research cost or a required upgrade tier for every account. Check your available banish capacity and decide whether you can carry out the plan consistently. Preparing that capacity beforehand is more useful than discovering partway through a promising run that you cannot block the remaining unwanted upgrades.
How do you read the 40% damage requirement?
Damage share is Psystrike damage divided by total run damage, expressed as a percentage. For an arithmetic example, if the total were 100,000 damage, Psystrike would need at least 40,000 to reach 40%. This is an illustration of the percentage calculation, not a claim that the game requires 100,000 total damage. A larger damage total can require a larger Psystrike contribution to keep the same share.
That is why raw Psystrike damage alone cannot confirm success. It may be rising while the percentage falls because other moves are adding damage faster. When checking a Cosmic Genome attempt, look at both the required attack and the total rather than celebrating a single large number. The reviewed threshold is at least 40%, so the goal is to meet that stated share while completing the win. No additional percentage target is established by the reviewed skin condition.
What if you accidentally upgrade another move?
An accidental upgrade does not automatically prove that the run has failed. Check the current Psystrike share, stop adding avoidable secondary damage upgrades, and review the share again before the final Boss. The useful question is whether the run can still satisfy the stated percentage and win condition. Continuing to strengthen other attacks simply because one mistake already happened can make recovery harder.
At the same time, banishing is not an undo button. If the secondary move is already stronger, work with the kit you actually have. If the required share is clearly out of reach, use the result to improve the next attempt's choices rather than pretending that a future banish will erase earlier levels. This troubleshooting advice follows the damage-share requirement; it does not establish a guaranteed rescue technique or promise that every mistaken upgrade can be recovered from.
What should you review before the final fight?
Confirm that the attempt still matches the full skin condition: Mewtwo is the selected companion, the run is on Nightmare, and Psystrike is meeting the required contribution. Review the current damage split without forgetting survival. A damage percentage in a run that ends before victory does not fulfill Cosmic Genome's combined requirement. The plan needs enough control and durability to turn the eligible damage distribution into a completed win.
Avoid making a late upgrade decision purely from its headline damage increase. Ask whether it supports the required attack, solves a survival problem, or adds competing damage that you do not need. The answer depends on the current run. PokéBonk legendary skins reward completing their specific conditions, so an upgrade that would be excellent for an unrestricted clear can be a poor choice for this restricted attempt. Read the card in the context of the challenge rather than in isolation.
How should you review a completed skin attempt?
For Mew, verify the Nightmare win with Mew against the Origin entry. For Mewtwo, verify the Nightmare win and the final Psystrike share together against Cosmic Genome. If the expected result is missing, record which condition you can actually confirm instead of treating “I reached the Boss” or “Psystrike did a lot of damage” as equivalent to the complete requirement. The final outcome is more informative than an earlier mid-run impression.
For the next attempt, change the relevant preparation step: select the correct challenge, improve banish capacity, prioritize Psystrike sooner, or stop upgrading secondary attacks. Keep the strategy specific to the skin you are pursuing. A focused approach to PokéBonk legendary skins avoids both unnecessary restrictions on Mew and insufficient damage control on Mewtwo. Read the condition, build for it, check it during the run, and confirm every part when the run ends.
