So went checking into Meowstic's moveset and the Rivals from XY and yeah, there's no excuse. They had to manually edit the moveset, including adding TMs(Shadow Ball for Calem) and early moves(Psychic at 35). But they left it with a 40 BP move even in the post-game Rematches, and the moveset receives basically no updates throughout the game*. The fact that they both use the exact same moveset may be a technical limitation, but if not then there's no reason Serena couldn't have Signal Beam instead. And there's no reason not to upgrade to Dazzling Gleam for both of them.
Honestly, this was a really missed opportunity. You see this mon a LOT, and always at the start of fights. Give Calem Fake Out/STAB/Dual Screens, Serena gets the ridic coverage moves. That would feel different when you faced each of them on repeat playthroughs, but more importantly it would feel VERY different when you team up with them for Double Battles. Plus, a partner who Fake Outs and then sets up screens would be a really interesting and helpful thing for casual playthroughs, and would help teach kids playing how useful the non-damage moves can be.
*After evolution(lvl 28), it's Psybeam/Disarming Voice/Fake Out/Light Screen, and lvl 44 through post-game it's Psychic/Disarming Voice/Fake Out/Shadow Ball. They don't even give it Extrasensory when it learns that at 35, just skip right to the illegal early Psychic.
Honestly, this was a really missed opportunity. You see this mon a LOT, and always at the start of fights. Give Calem Fake Out/STAB/Dual Screens, Serena gets the ridic coverage moves. That would feel different when you faced each of them on repeat playthroughs, but more importantly it would feel VERY different when you team up with them for Double Battles. Plus, a partner who Fake Outs and then sets up screens would be a really interesting and helpful thing for casual playthroughs, and would help teach kids playing how useful the non-damage moves can be.
*After evolution(lvl 28), it's Psybeam/Disarming Voice/Fake Out/Light Screen, and lvl 44 through post-game it's Psychic/Disarming Voice/Fake Out/Shadow Ball. They don't even give it Extrasensory when it learns that at 35, just skip right to the illegal early Psychic.