Croagunk Crane Clan.
Four level 2 type-shifted Croagunks Fire/Fighting for 2, Poison/Ice for other two. There's one male and one female of each variety.)
 
 
HP: 67
Hit Points: 15
Attack: 18
Defense: 4
Special Attack: 4
Special Defense: 4
Speed: 5
 
All of them have these moves:
1 Astonish - Ghost
3 Mud-Slap - Ground
8 Poison Sting - Poison
10 Taunt - Dark
15 Pursuit - Dark
17 Faint Attack - Dark
22 Revenge - Fighting
EGG Crane Pose
 
Crane Clan Pose: +2 CS ATK. Crit range increases by 1 every time it's used, stacks with itself for up to a total increase of 4..
 
Each turn, either the Red or Blue croagunks attack while the other Use Crane Clan Pose. It alternates.
 
Fire/Fighting also have: Fire Punch, Counter, Fire Spin
 
Poison/Ice also have: Ice Punch, Ice Shard (Interrupt!), Poison Jab
 
   X
X YY  X
   X
Y = Yumeko and her mon, X = enemies. Basically, two blue croagunks drop from the ceiling and two red ones jump out of trapdoors.
 
Throw Blue Reflect walls and Yellow Light Screen walls. You can only pass through them if you started your turn on the corresponding blue or yellow tiles.
Pink tiles have a 50% chance of healing you for 1/8 max HP, 50% chance of poison. Poison types can't be poisoned and have no effect if they roll poisoning. Same with already-poisoned people or mons. Not every space has a tile.
 
Upon defeating these four croagunks, they drop a single Energy Root that can be used to make sure Yumeko has a pokemon left for the BOSSFIGHT.
 
 
Dark/Poison/Fighting tri-typed Toxicroak
LV 26
HP: 68
Hit Points: 14
Attack: 20
Defense: 10
Special Attack: 7
Special Defense: 10
Speed: 15
 
Natural Moves (Some are learned early deal with it)
Taunt - Dark
Pursuit - Dark
Faint Attack - Dark
Revenge - Fighting
Swagger - Normal
Mud Bomb - Ground
Sucker Punch - Dark
 
Tutor Moves:
Poison Gas
Jump Kick
Torment
Toxic Spikes
Counter
Crane Pose
Toxic
 
Effectiveness:
2x: Ground, Flying
Neutrral: All others
Immune: Psychic
1/2: Ghost, Grass, Poison, Bug, Rock
1/4: Dark
 
If Yumeko loses, she's booted from their base in the swamp with "CROAGUNK CRANE CLAN RULEZ" permanent markered all over her face. It'll wash off. Eventually.
 
If Yumeko wins, she receives the following loot:
Crane Kick or Crane Pose TM
1-use Smoke Ball
Yoshi Egg (Hatch when given fruit!)
Samurott Snake Syndicate friends?
 
 
Crane Kick - Fighting
3d8+10 - Battle - 2
Attack - Melee
Effect: 1 Target
If the target is below 50% HP, Crane Kick
deals 5d12+22 during Damage Dice
Roll.