You don't have to choose a target for the reflexive triggered ability created by Lockjaw's last ability, but if you do, and that target is illegal as that ability tries to resolve, it won't resolve and none of its effects will happen
(This includes by the ward ability.) Gain control of target creature until end of turn
Its an interesting politics piece that makes life hard for everyone, assuming no one has an answer for an 8/8 flier
And with only needing three Energy and an Eevee to evolve from, this can be a very damaging card against Fire-type and Electric-type decks
Past Event [Ended] Evolution Cup 2025 Vol
To those with even a passing interest or knowledge in Pokmon, this will be an unsurprising outcome as cards featuring the worlds favourite Pokmon usually ascend to the zenith of popularity (such as the Shiny Charizard from Shining Fates)