Sure, then there can be a Wood type Pokemon that can only be caught in the morning.
But seriously, I don't see how it'd differ enough from Grass. Plus it'd be annoying to sort out te weakness/resitance differences imo. --- "If you level up a Swellow at night then give it a Dusk Stone [they didn't exist yet] then it will evolve into Ostricho." ~ The Legend of Ostricho
What is this, BattleNetwork? We don't need a Wood type.
That would be fun. We could have Aqua-type, Elec-type, Sword-type, Wind-type... What are the others? I forgot. --- Official Zangoose of the Pokemon X board+Only member of my one-man team 3DS FC: 3609-1237-6725