R8, H8, B8, and Appreci8

Mega-Meganium
Grass/Fairy
Triage
HP: 80
Atk: 82 -> 92 (+10)
Def: 100 -> 135 (+35)
SpAtk: 83 -> 113 (+30)
SpDef: 100 -> 135 (+35)
Spd: 80 -> 70 (-10)

Mega-Typhlosion
Fire
Stakeout
HP: 78
Atk: 84
Def: 78 -> 91 (+13)
SpAtk: 109 -> 150 (+41)
SpDef: 85 -> 105 (+20)
Spd: 100 -> 126 (+26)

Feraligatr-Mega
Water/Dark
Strong Jaw
HP: 85
Atk: 105 -> 140 (+35)
Def: 100 -> 113 (+13)
SpAtk: 79
SpDef: 83 -> 110 (+27)
Spd: 78 -> 103 (+25)

Mega-Torterra
Grass/Ground
Grassy Surge
HP: 95
Atk: 109 -> 124 (+15)
Def: 105 -> 150 (+45)
SpAtk: 75 -> 80 (+5)
SpDef: 85 -> 120 (+35)
Spd: 56

Mega-Infernape
Fire/Psychic
Psychic Surge
"learns Psychic by TM"
HP: 76
Atk: 104 -> 124 (+20)
Def: 71 -> 81 (+10)
SpAtk: 104 -> 134 (+30)
SpDef: 71 -> 101 (+30)
Spd: 108 -> 118 (+10)

Mega-Empoleon
Water/Steel
Drizzle
HP: 84
Atk: 86 -> 96 (+10)
Def: 88 -> 118 (+30)
SpAtk: 111 -> 141 (+30)
SpDef: 101 -> 131 (+30)
Spd: 60

Chesnaught-Mega
Grass/Steel
Stance Change
HP: 88
Atk: 107 -> 137 (+30)
Def: 122 -> 142 (+20)
SpAtk: 74 -> 84 (+10)
SpDef: 75 -> 129 (+55)
Spd: 64 -> 50 (-14)

Mega-Incineroar
Fire/Dark
Arena Trap
HP: 95
Atk: 115 -> 130 (+15)
Def: 90 -> 115 (+25)
SpAtk: 80 -> 100 (+20)
SpDef: 90 -> 115 (+25)
Spd: 60 -> 65 (+5)