>>41946734>What's the fundamental difference that makes Megas OK but Dynamax not?Let's use Mega Gyarados and Dynamaxed Gyarados for this instance.
>Mega GyaradosNew typing, meaning new weaknesses and resistances
New ability, meaning that kills while you're mega gyarados don't give you an attack boost
New stats, meaning that while the HP doesn't change, Mega Gyara and norma Gyara play somewhat differently
Moves stay the same, aside from new and lost STAB, meaning that a bounce from Mega Gyara and normal Gyara are the same move
Takes up a held item slot, meaning a Mega Gyara can't use, say, Lum Berry, Leftovers, or Heavy Duty Boots
Lasts the whole battle, so once you click that Mega button you're Mega Gyara until the battle ends.
>Dynamax GyaradosSame typing, meaning the things that checked it before can still have a chance if predicted well
Same Ability, meaning Dynamax Gyara gets a free attack boost on kill
HP is doubled, meaning that attacks that could OHKO before can't do that now.
Moves are replaced with Max Moves, so clicking Bounce as Dyna Gyara will instead use a more powerful move, Max Airstream, which gives Gyarados a boost to Speed, can't miss, takes one turn, AND can punch through Protect/Detect
Doesn't take up an item Slot, meaning that Dyna Gyara can shrug off a Status, be immune to Hazards, recover a bit of HP each turn, et cetera
Lasts 3 turns, which means that it's hypothetically possible to stall it out.