Ruby help/advice needed!

[Alabaster.j.cat]

I recently restarted My ruby game and came to a stand still. I am quite stuck at the Mauville City Gym. I need to know of how i can fix up my team or anything else that will help me win.

Current team:

Oddish Lv. 19
Item--Nothing
Move set:
Sweet Scent
Poison Powder
Stun Spore
Sleep powder

Zigzagoon Lv. 17
Item--None
Move set:
Tackle
Headbutt
Sand-Attack
Cut

Grovyle Lv. 24
Item--Miracle Seed
Move set:
Screech
Pursuit
Absorb
Quick Attack

Dustox Lv. 15
Item--none
Move Set:
Flash
Poison Sting
Confusion
Gust

Geodude Lv. 9 (in training)
Item--Everstone
Move set:
Tackle
Defense Curl
Mud Sport

Minun Lv. 13
Item--none
Move set:
Growl
Thunder Wave
Quick Attack
Helping hand

I really dont have many other pokemon that arent Flying type of some sort, but i seriously need help i've been stuck for days.

 

[Blackjack Gabbiani]

That Geodude will probably wind up being your saving grace. Raise it up and teach it Rock and Ground moves.