I remember using Tropius as a fast, bulky support mon at some point in the lower tiers, using Harvest to perpetually recycle a Sitrus Berry. I think the set was something like this: Spoiler Tropius @ Sitrus Berry Ability: Harvest EVs: 252 HP/ 4 SpD / 252 Spe Jolly Nature - Toxic - Protect - U-Turn - Defog It wasn't super great, but i liek tropiuz so I used it a fair bit. In terms of how to make it better, I'd suggest putting the extra stats into bulk. Tropius is not a brilliant attacker by any means, but a potential 109/93/97 base bulk is nothing to scoff at. If it's not too busted, I'd also give it another evolution stage (it doesn't matter what) so that Tropius can abuse Eviolite, making it a really hefty tank. Tropius Grass/Flying Chlorophyll/Harvest/Solar Power HP: 99 -> 109 ATK: 68 DEF: 83 -> 93 SPA: 72 SPD: 87 -> 97 SPE: 51 There are a lot of possible sets for this stat spread due to Tropius' broad existing supportive movepool, but a possible set could look something like this: Spoiler Tropius @ Eviolite Ability: Chlorophyll EVs: 4 HP / 252 Def / 252 SpD Careful Nature - Toxic / Leech Seed - Roost - U-Turn - Defog In my opinion, Tropius would be really really stronk with these changes, and would probably be able to contend with the likes of Ferrothorn and Tangrowth as the premier grass support mon for OU. It can even work in both Sun and Trick Room depending on the IVs you give it.