>>46661088It's neither
>>46661268In a normal playthrough it's never more useful to use barrier than it is to damage the opponent or use a status move. And there's no reason to ever use synthesis when you can just use a healing item that heals for more. That's just a waste of a move slot in Meganium's already limited movepool.
The Bellsprout you can catch before the first gym has better attacking stats to back Razor Leaf (which it also learns) AND it has access to Sleep Powder, Stun Spore, and Wrap in addition to Poison Powder. Chikorita is upstaged by one of the first wild Pokemon you encounter in that game