>>55649625Too much effort when its inclusion won't guarantee an extra 30 million copies sold.
This is ALWAYS the answer for why something disappears from the games, and is ALSO the answer why something reappears in a game.
Mega Evolutions in L:Z-A? Money that's exploiting the fact that there's nostalgia for Gen 6 now, and they get to pretend they're "finally giving the fans what they want after years of demands and pleas" for all of one game that'll be forgotten and made irrelevant in 2026 by Gen 10.