Before Round 1:

HP: 90
Energy: 100
Atk: Rank 2
Def: Rank 2
SpA: Rank 4 (+)
SpD: Rank 2
Spe: 30 (-)
Boosts/Drops: None
Status Conditions: None

HP: 90
Energy: 100
Atk: Rank 2 (+)
Def: Rank 2
SpA: Rank 1
SpD: Rank 2
Spe: 21 (-)
Boosts/Drops: None
Status Conditions: None
Action 1:
Volco uses Flamethrower
RNG Roll for hit: 24/100 (yes)
RNG Roll for burn: 31/100 (no)
RNG Roll for crit: 15/16 (no)
Damage: (10+3+1.5(4-2))*1.5=24
Energy: 7
Kricketot uses Mud-Slap
RNG Roll for hit: 22/100 (yes)
RNG Roll for crit: 2/16 (no)
Damage: (4+1.5(1-2))*1.5=3.75~4
Energy: 3
Volco's Accuracy drops a stage
Action 2:
Volco uses Ancientpower
RNG Roll for hit: 80/100 (yes)
RNG Roll for boosts: 60/100 (no)
RNG Roll for crit: 4/16 (no)
Damage: (6+1.5(4-2))=13.5~14
Energy: 4
Kricketot uses Mud-Slap
RNG Roll for hit: 30/100 (yes)
RNG Roll for crit: 4/16 (no)
Damage: (4+1.5(1-2))*1.5=3.75~4
Energy: 3+4=7
Volco's Accuracy drops a stage
Action 3:
Volco uses Flamethrower
RNG Roll for hit: 78/100 (no)
Energy: 7
Kricketot uses Mud-Slap
RNG Roll for hit: 40/100 (yes)
RNG Roll for crit: 10/16 (no)
Damage: (4+1.5(1-2))*1.5=3.75~4
Energy: 3+4+4=11
Volco's Accuracy drops a stage
After Round 2:
HP: 78
Energy: 81
Atk: Rank 2
Def: Rank 2
SpA: Rank 4 (+)
SpD: Rank 2
Spe: 30 (-)
Boosts/Drops: -3 Acc
Status Conditions: None

HP: 52
Energy: 79
Atk: Rank 2 (+)
Def: Rank 2
SpA: Rank 1
SpD: Rank 2
Spe: 21 (-)
Boosts/Drops: None
Status Conditions: None