Tirtouga is a great Pokemon, but only if you are using a Shell Smash set.
Purotooga (M) @ Eviolite
Trait: Sturdy
EVs: 84 HP / 212 Atk / 12 Def / 180 Spd
Jolly Nature (+Spd, -SAtk)
- Aqua Jet
- Stone Edge
- Shell Smash
- Earthquake
Aqua Jet is better than Waterfall even with Shell Smash because sometimes you just need that priority. Whether it is when they send out a Mach Punch user to try and take it out or if even before Shell Smash is used you just cannot risk using Shell Smash for some odd reason then Aqua Jet will prove incredibly useful.
Houndour does much better than Ponyta at the job of Firettype with Flash Fire Special Sweeper.
Houndour (M) @ Life Orb
Trait: Flash Fire
EVs: 200 SAtk / 40 SDef / 240 Spd
Mild Nature (+SAtk, -Def)
- Fire Blast
- Nitro Charge
- Dark Pulse
- Hidden Power [Fighting]
You'll find Snivy to be a better Pokemon than Treecko.
Tsutaaja (M) @ Evolution Stone
Trait: Perversity
EVs: 240 SAtk / 252 Spd
Timid Nature (+Spd, -Atk)
- Leaf Storm
- Taunt
- Hidden Power [Ground]
- Giga Drain
Shinx is far too slow to get any damage in before being taken down. Elekid is a great sweeper, with plenty of type coverage, an ability that protects it from Spore and Hypnosis, and great Attack and Speed. It even has better defensive stats than Shinx.
Elekid (M) @ Choice Band
Trait: Vital Spirit
EVs: 252 Atk / 236 Spd
Adamant Nature (+Atk, -SAtk)
- Cross Chop
- Ice Punch
- Fire Punch
- ThunderPunch
I see you have a Bronzor. Well, with a better moveset than that you can easily make it into a lead like most people tend to do.
Bronzor @ Evolution Stone
Trait: Levitate
EVs: 220 HP / 4 Atk / 228 Def / 4 SAtk / 12 Spd
Sassy Nature (+SDef, -Spd)
- Hypnosis
- Stealth Rock
- Psychic
- Earthquake
Then we just need to improve that Munchlax moveset and we are good to go.
Munchlax (M) @ Evolution Stone
Trait: Thick Fat
EVs: 236 HP / 236 Atk / 36 Def
Careful Nature (+SDef, -SAtk)
- Curse
- Frustration
- Fire Punch
- Earthquake / Pursuit