***NOTES ASSUME NO MANIP***
 
The team:

L (Latios) @ Lum Berry
Ability: Levitate
Level: 50  
EVs: 4 HP / 252 SpA / 252 Spe  
Modest Nature  
IVs: 31 HP / 0 Atk / 31 Def / 31 SpA / 31 SpD / 31 Spe  
- Psychic  
- Thunderbolt 
- Surf
- Dragon Claw

H (Heracross) (F) @ Choice Band
Ability: Guts  
Level: 50  
EVs: 4 HP / 252 Atk / 252 Spe  
Jolly Nature  
IVs: 31 HP / 31 Atk / 31 Def / 31 SpA / 31 SpD / 31 Spe  
- Megahorn
- Brick Break  
- Facade  
- Earthquake
 
B (Blissey) (F) @ Quick Claw 
Ability: Natural Cure
Level: 50  
EVs: 252 Def / 252 SpA / 4 Spe  
Modest Nature  
IVs: 31 HP / 0 Atk / 31 Def / 31 SpA / 31 SpD / 31 Spe  
- Aromatherapy
- Softboiled
- Fire Blast
- Toxic 

Routing notes:
- Keen Eye and Intimidate don't work
- Checking the hint becomes worth it in later rounds, but not early
- Natural Cure makes status rooms much less risky, and maybe worth checking more
 
Ideas:
- Latios (Modest @ Lum Berry, Psychic/Thunderbolt/Surf/Dragon Claw)
- Heracross (Jolly @ Choice Band, Guts, Megahorn/Brick Break/Facade/EQ) 
- Blissey (Modest @ Quick Claw, 252 Def/252 SpA, Natural Cure, Aromatherapy/Softboiled/Fire Blast/Toxic)

Team notes:
- Blissey's purpose is to allow the team to plow through status rooms without major risk. Not sure this EV spread is optimal, but Fire Blast beats some Pokemon that can cause issues for this team (mainly Skarmory and Scizor).
- Lead Latios in Rounds 1, 2 and 10
- Lead Heracross in Rounds 3-9
- After early rounds (YOLO and reset bad luck), just go for nostalgia or whispering rooms