Back when Tigers used to smoke.
Hey. Someone remembers the BREAK mechanic from TCG but I'd say yes and no because the BREAK Mechanic itself was the TCG's solution into giving every single Pokemon that they ever wanted their very own "Mega Evolution" only it's called the "BREAK" mechanic. Which is why I believe that GameFreak intends to give every Pokemon their very own "Mega Evolution" only it's called the "Dynamax" mechanic. Actually now that I talked about it, I guess the two are very similar in concept considering there supposed to be a substitute for Mega Evolution.Dynamax mechanic seems to be inspired by BREAK Evolution from TCG and Giant Pokémon from various canons(including our lovely Totem Pokémon), but unlike those it can also affect earlier stages, which makes it VERY good.
The Direct video shows unlike Z-moves which all transform to a pre-set move, updated moves in Dynamax are just powered up versions of their existing moves(Eldegoss' move has the same mushroom animation from Spore, for example).
Another thing to note is it doesn't seem you will be able to switch your Pokémon when Dynamaxed, which if true is a huge deal.