What Pokémon should I put on my team for Flying, Ground, and Grass coverage in Shining Pearl?

(If this seems repetitive I posted this on r/ Pokemon_BDSP as well) So, I started the game. My Prinplup is going to stay on my team, and so is my Shinx and my Abra (after it evolves of course). My awesome brother is going to hatch a Houndour egg for me. The rest of my team is up in the air. Currently I have a Staravia, Zubat, and Geodude. I was going to trade out the Staravia for the Houndour and leave my Zubat as the Flying type, but turns out according to Bulbapedia it wasn’t the Grass/Flying/Poison coverage I thought as it only learns Absorb by level up (I thought Giga Drain would come along later as Crobat but I need to find the TM) and the Flying and Poison moves happen quite late for all the Flying weakness opponents in particular. Using Staravia, however removes all Grass coverage from my team. The only Grass/Flying mon in the game is Tropius and that one never struck me as strong. I also feel I should get a better Ground type than Geodude, which, correct me if I’m wrong, has never seemed very powerful either. So, umm, what should I do? Cause I’m stumped.

Pleaselog inorregisterto add a comment.

No one’s giving any more advice, so I’ll get this off the unanswered list.

Your Flying coverage is fulfilled withStaraptor, one of the best Flying types in the game, so that’s not an issue.

As you’ve expressed wanting to remove Zubat from your team,Roseradeis a perfect Grass addition that overlaps types with none of your teammates. It’s one of the strongest Grass types in Sinnoh, available early and able to carry it’s weight through the entire game.

For your Ground type,Garchompis arguably the best in the game. It comes fairly late, but it’s easy to get up to speed with the Exp. Share. It’s a powerful asset against the final stages of the game, and if you’re able to get a Gible early on, the first part of the game is a cakewalk.

Alternatively, if you’re not willing to wait that long,Gastrodonis a good Ground type. It overlaps types with Piplup, but it and Empoleon don’t share any weaknesses. It’s a solid Ground type substitute for Garchomp if you’d like Electric coverage early. Alternatively, Graveler can suffice until you get a Gabite.