Teambuilding thread Discuss teambuilding, post sets and teach

This is my Slowbro desu

Slowbro-Mega (F) @ Slowbronite
Ability: Regenerator
EVs: 252 HP / 252 Def / 4 SpD
Bold Nature
IVs: 0 Atk
- Toxic
- Amnesia
- Rest
- Foul Play

UU Team:

Beedrill-Mega @ Beedrillite
Ability: Adaptability
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Knock Off
- Poison Jab
- U-turn
- Protect

Swampert @ Rocky Helmet
Ability: Damp
EVs: 252 HP / 252 Def / 4 SpD
Relaxed Nature
- Stealth Rock
- Roar
- Scald
- Earthquake

Blissey @ Leftovers
Ability: Natural Cure
EVs: 4 HP / 252 Def / 252 SpD
Bold Nature
IVs: 0 Atk
- Heal Bell
- Wish
- Seismic Toss
- Toxic

Crobat @ Choice Band
Ability: Infiltrator
EVs: 252 Atk / 252 Spe
Jolly Nature
- Brave Bird
- Cross Poison
- U-turn
- Defog

Chandelure @ Choice Scarf
Ability: Flash Fire
EVs: 252 SpA / 252 Spe
Modest Nature
IVs: 0 Atk
- Fire Blast
- Trick
- Energy Ball
- Shadow Ball

Heliolisk @ Life Orb
Ability: Dry Skin
EVs: 252 SpA / 252 Spe
Timid Nature
IVs: 0 Atk / 30 Def
- Volt Switch
- Thunderbolt
- Hidden Power [Ice]
- Hyper Voice

>>29034425
Forgot to add, I don't play competitive a lot but I do like watching watching battles and some VGC. So I'd really like some advice on battling and especially my teambuilding.

OU Team. Playing on 3DS so I went for no legendaries.

Rotom-Heat @ Sitrus Berry
Ability: Levitate
EVs: 244 HP / 44 Def / 220 Spe
Bold Nature
- Overheat
- Volt Switch
- Will-O-Wisp
- Pain Split

MUDAMUDAMUDA (Heracross-Mega) (M) @ Heracronite
Ability: Skill Link
EVs: 240 HP / 136 Atk / 40 Def / 92 Spe
Adamant Nature
- Close Combat
- Pin Missile
- Rock Blast
- Substitute

Sabaton (Bisharp) (M) @ Focus Sash
Ability: Defiant
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Knock Off
- Sucker Punch
- Iron Head
- Swords Dance

Clefable (M) @ Leftovers
Ability: Magic Guard
EVs: 252 HP / 172 Def / 84 SpD
Calm Nature
- Moonblast
- Thunder Wave
- Soft-Boiled
- Calm Mind

Starmie @ Life Orb
Ability: Natural Cure
Shiny: Yes
EVs: 4 Def / 252 SpA / 252 Spe
IVs: 30 Atk / 30 SpA / 30 Spe
Timid Nature
- Hydro Pump
- Psyshock
- Rapid Spin
- Ice Beam

Garchomp (M) @ Rocky Helmet
Ability: Rough Skin
EVs: 252 HP / 4 Atk / 252 Def
Impish Nature
- Earthquake
- Fire Blast
- Stealth Rock
- Dragon Tail

>>29034473
Looks really good, actually. I don't like running blissey/chansey on offensive teams but it might works well for you.

>>29034483
Can you suggest something else? or anyone else?

Charizard-Mega-X @ Charizardite X
Ability: Tough Claws
EVs: 252 Atk / 4 SpD / 252 Spe
Adamant Nature
- Dragon Claw
- Flare Blitz
- Dragon Dance
- Roost

Garchomp @ Focus Sash
Ability: Rough Skin
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Dragon Claw
- Earthquake
- Swords Dance
- Stealth Rock

Manaphy @ Sitrus Berry
Ability: Hydration
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
IVs: 0 Atk
- Tail Glow
- Scald
- Ice Beam
- Energy Ball

Serperior @ Focus Sash
Ability: Contrary
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
IVs: 0 Atk / 30 SpA / 30 Spe
- Leaf Storm
- Giga Drain
- Hidden Power [Fire]
- Glare

Sylveon @ Leftovers
Ability: Pixilate
EVs: 252 HP / 4 SpA / 252 SpD
Calm Nature
IVs: 0 Atk
- Hyper Voice
- Heal Bell
- Wish
- Protect

Excadrill @ Leftovers
Ability: Mold Breaker
EVs: 252 HP / 4 Atk / 252 Def
- Earthquake
- Iron Head
- Rapid Spin
- Toxic

This team works well enough, but I hardly ever win with charizard x, most of my wins seem to come from sylveon or serpeior. Anything I can change to utilize him more.