The complete Pokemon RBY pokedex, part 7

Pokémon Name: Weepinbell
Type: Grass/Poison
Classification: Flycatcher Pokemon
Pokédex Number: 070
Ability: Chlorophyll
Dream World ability: Gluttony
Useful Attacks: Razor Leaf
Location Found:
Diamond/Pearl: Routes 224, 229 and Route 230
Platinum: Routes 224 and 230
HG/SS: Routes 24, 25, 44, Safari Zone (Swamp); Pokewalker - Treehouse
Black: Trade, Poke Transfer
White: Evolve Bellsprout

The same moves in the same order as Bellsprout - here you're only getting enhanced stats. Plenty of decent offensive and stat-altering choices here, like Razor Leaf and Sweet Scent.

Evolution: From Bellsprout at 21, to Victreebel via Leaf Stone