Beat the Anime Boss Mutations

Mutation and base-variant reference

The official listing confirms that rare mutated units have boosts. The specific tab names below come from PixelMisfit’s Index view, published on 2026-09-03. These observations identify variants; they do not provide drop rates or a complete current stacking formula.

How to compare mutated units fairly

1. Match the unit name. Comparing two different characters mixes base-unit differences with mutation effects.
2. Match the level. An upgraded normal copy and a fresh mutated copy do not isolate the mutation boost.
3. Check current effects and event status. A changing boost can make two observations look inconsistent.
4. Record both income per second and damage. Your preferred unit depends on whether money or boss clear time is limiting progress.
5. Compare the cost of the next upgrade and the slot you would replace. Evaluate the net team change before spending.

The upgrade payback calculator can compare the displayed before and after income. Enter those final values directly so a mutation already included by the game is not counted twice.

Finding mutations and checking acquisition claims

Beat the Anime Boss mutations are part of the collection loop, but the reviewed official description does not publish their exact odds or acquisition rules. Check the current summoner, Index and any relevant in-game description for the variant you want.

A higher summoner level is officially described as improving rolls. That does not establish a specific mutation chance, nor does a named luck event prove that every variant receives the same bonus. Use a currently displayed target chance if you want a probability estimate.

When reporting a multiplier or recipe, include the unit name, level, variant, active effects and a readable source. That makes the observation useful for a future revision instead of turning one unusually strong copy into a universal rule.