I've made teams for the demo's Gym Leaders. I'm going for a challenging, but fair campaign.

Otto/Mia - Normal
Hoothoot - Keen Eye - Return/Hypnosis/Confusion/Peck
Tandemaus - Run Away - Return/Baby-Doll Eyes/Bullet Seed/Double Hit
Baritoad - Soundproof - Return/Disarming Voice/Supersonic/Growl

Woodrow - Grass
Skiploom - Chlorophyll - Acrobatics/Leech Seed/Mega Drain/Cotton Spore
Trevenant - Natural Cure - Will-O-Wisp/Confuse Ray/Leech Seed/Branch Poke
Elkindle - Flash Fire - Trailblaze/Flame Wheel/Double Kick/Stomp

Marina - Water
Drednaw - Strong Jaw - Razor Shell/Ice Fang/Crunch/Rock Tomb
Cloyster - Skill Link - Icicle Spear/Chilling Water/Rock Blast/Ice Shard
Ludicolo - Rain Dish - Fake Out/Chilling Water/Teeter Dance/Rain Dance
Bubbeetle - Swift Swim - Chilling Water/Mud Shot/Icy Wind/Bubble Beam

Garbodor - Toxic Debris - Venoshock/Knock Off/Body Slam/Amnesia
Victreebel - Chlorophyll - Venoshock/Leaf Tornado/Sucker Punch/Acid
Crobat - Inner Focus - Mean Look/Wing Attack/Confuse Ray/Tailwind
Sanguitross - Overcoat - Venoshock/Crunch/Giga Drain/Bounce

Baritoad - Normal - 61/50/45/74/45/75
Elkindle - Grass/Fire - 116/113/68/50/65/75
Bubbeetle - Bug/Water - 85/70/105/95/85/60
Sanguitross - Poison/Dark - 105/115/80/85/80/50