In my opinion, Ludicolo is the best Grass Pokemon, because the Water/Grass combo is strong or neutral to most attacks.
Chat with our AI personalities
Well if you ment GRASS Pokemon in ruby the best is the first one you can get from proffesser Oak, trecko, who evolves to groovyle on lvl. 15-16 and then sceptile on lvl. 36. Sceptile is far the srtongest grass typer Pokemon EVER!!! (in ruby)
Any Pokemon you want, grass types are usually what people will teach it too.
By walking through the ash covered grass.
Go to the ragged path and look in the long grass
get at TREEKO! TREEKO HAS AND ALWAYS WILL NOT ONLY BE THE BEST GRASS POKEMON BUT MY FAVORITE AND THE ABSOLUTE BEST!