Legacy move pokemon that evolve lose their legacy move (So if you have a legacy Rhydon with megahorn, Rhyperior will not have Mega horn no matter how many TM's you use on it) You can keep a legacy fast move or charge move as TM's are charge or fast move specific, using a fast TM will reroll the fast move, and the charge TM will do the same for the charge move, so you just need to use the TM that corresponds to the type of move you want to get rid of (So if you want to keep a legacy fast move but different charge move, use a charge TM, the other way around, use the fast TM, not the charge.)
GamePress
Does Legacy Pokemon have the new move list when using TM?
I'm a returning player and i have a lot of pokemon from 2016 with legacy movelist, and quite possibly also legacy evolution path. The question is straightforward, can i get the new movelist (example: the new charge move) when i use TM on the legacy pokemon? because i want the legacy quick move but not charge move.
My Magneton also face the same problem, it cannot seem to be evolved to magnezone, there's no option for it, as far as the game is concerned it is the final evolution. Or does magnezone requires a certain "unlock" condition i'm missing?
Thank you for any answer