(at Dive/Waterfall HP, doesn't need to be Blaze)

Anything/Forretress (1:58)
1: Glitch X Special + HP Grass Claydol
2: Flame Wheel Forretress + Psychic whatever (no real time difference if Forretress double Protects)
3: Dig + Psychic Whiscash (hopefully you're low enough for Entei)
4: Psychic Entei

Claydol/Whiscash (2:10)
1: Protect + HP Grass Whiscash
2: Glitch X Special + HP Grass Claydol
3: Flame Wheel Forretress + Psychic Flygon
4: Psychic Entei

Flygon/Whiscash (2:10)
1: Protect + HP Grass Whiscash
2: Glitch X Special + Psychic Flygon
3: Flame Wheel Forretress + HP Grass Claydol
4: Psychic Entei

Claydol/Flygon (2:10)
1: Protect + Psychic Flygon (77% range)
2: Glitch X Special + HP Grass Claydol
3: Flame Wheel Forretress + Psychic Whiscash
4: Psychic Entei

Gatr's fight is about 1:59
Average: 2:06.2
New average: ????