When Ditto uses transforms in a battle, the answer provided on this question says

It appears that as far as CP is concerned, Ditto simply takes on the base attack, stamina and defense stats of the Pokémon that it transforms into. These values, along with the Ditto's individual values, are plugged into the CP formula.

The formula and calculations are also provided as well.

This works for regular gym battles against other trainer's Pokémon, however raid bosses have anywhere between 8,000 - 25,000 CP with IVs that are probably higher than anything a gym will hold.

How does Ditto's transform ability work when fighting a raid boss?

  • Watching some videos, it almost seems like the Ditto transformed with ~15% of the total CP of the raid boss.
    – Timmy Jim
    Commented Jun 26, 2017 at 12:46
  • @TimmyJim not true. I'm looking at a 578 CP Ditto vs a 27k CP Venusaur.
    – Vemonus
    Commented Jun 26, 2017 at 13:02

1 Answer 1


Information in this thread indicates that Dittos behave against raid bosses just as they would against regular gym defenders. That is, the Ditto will pick up the Attack and Defense IVs of the raid boss and convert its CP accordingly. However, it will not increase its HP stat or its level, so it will likely just be a sort of glass cannon, depending on what it transformed into. The reason that raid boss Pokémon have such high CP is due to them being buffed to a level impossible to actually attain as a player, which a Ditto wouldn't copy.

Just saw my first raid and went for it even though it was an easy difficulty level. Croconaw, CP5207. Ditto transformed into him and didn't even faint as myself and another trainer's Jolteon defeated it in 27 seconds. My Ditto was CP1270 after using transform, but was surprisingly able to weather two Crunches and a few Scratches. (A 96%, L28.0 Croconaw is CP1270, by the way—same level and IVs as my Ditto, Blob Loblaw. I still feel like there's something else at play, since he was able to survive two Charge moves.)

In other words, Ditto isn't completely useless in raid battles, since it will likely have a high defense against the raid boss (turning into a Venusaur whose Solar Beam is now 4x ineffective against a transformed Ditto, etc, but exact opposite situation if transforming into Dragonite (weak against its own typing)), but since a transformed Ditto retains its HP, it likely won't last too long in battle.

  • I solo-ed a boss (not with a ditto) and took almost no damage despite the boss having double my Pokèmon's CP. So I think the "something else at play" might be that the bosses aren't as powerful as their CP would lead you to believe.
    – Kat
    Commented Jun 26, 2017 at 14:09
  • @Kat from stuff I've read, it sounds like only the raid boss's defense and HP scale up with the level. The attack stays at a normal level, otherwise raid bosses would one shot everything in sight.
    – Vemonus
    Commented Jun 26, 2017 at 14:36
  • 1
    @Vemonus Yes, but I also solo ed a Tier 2 gym raid boss, and CP is basically just the overall power. This is affected by IV, HP, Level etc.
    – Xetrov
    Commented Jun 27, 2017 at 6:50

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