>>19087942Venusaur has chlorophyll and one of the bulkiest megas, losing its weakness to Fire and Ice attacks.
Charizard gained two megas each capable of outdamaging even the most powerful legendary pokemon.
Blastoise didn't get shit compared to the other two. It's not even like Smashtoise would be the end all of setup sweepers; It still can't even hit Azumarill that well.
Mega Smashtoise would be the special equivalent of Cloyster without shitty defenses.