Sina (after arriving in Heahea City, Moon-sided games only)
Smoochum - L15, 43 HP, 16 Atk, 11 Def, 32 SpA, 26 SpD, 26 Spe
Glaceon - L15, 49 HP, 25 Atk, 40 Def, 46 SpA, 35 SpD, 29 Spe
Dexio (after arriving in Heahea City, Sun-sided games only)
Mime Jr. - L15, 35 HP, 14 Atk, 20 Def, 28 SpA, 34 SpD, 25 Spe
Espeon - L15, 49 HP, 26 Atk, 25 Def, 46 SpA, 35 SpD, 42 Spe
Dexio (postgame, on the border of Poni Plains and Poni Meadow, to win the Key Stone, both games)
Espeon - L60, 166 HP, 101 Atk, 95 Def, 216 SpA, 137 SpD, 192 Spe
Raichu - L60, 160 HP, 125 Atk, 83 Def, 174 SpA, 125 SpD, 192 Spe
Slowking - L60, 239 HP, 113 Atk, 119 Def, 180 SpA, 155 SpD, 59 Spe
Metagross - L60, 184 HP, 222 Atk, 216 Def, 137 SpA, 131 SpD, 107 Spe
Alakazam - L60, 154 HP, 83 Atk, 101 Def, 270 SpA, 149 SpD, 240 Spe (after going mega)
Dexio (postgame, Aether trailer on route 16, after catching Zygarde-50, to win Zygarde-10, both games)
Espeon - L63, 173 HP, 105 Atk, 99 Def, 227 SpA, 143 SpD, 202 Spe
Raichu - L63, 167 HP, 131 Atk, 86 Def, 183 SpA, 131 SpD, 202 Spe
Slowking - L63, 251 HP, 118 Atk, 124 Def, 189 SpA, 162 SpD, 61 Spe
Metagross - L63, 192 HP, 233 Atk, 227 Def, 143 SpA, 137 SpD, 112 Spe
Alakazam - L63, 161 HP, 86 Atk, 80 Def, 233 SpA, 143 SpD, 214 Spe (it can't go mega this time)
Zygarde-10 - L63, 159 HP, 189 Atk, 113 Def, 140 SpA, 131 SpD, 168 Spe