The Pikaclone of Generation 8, Morpeko's claim to fame is being Hangry. No seriously. And while Morpeko's signature move Aura Wheel is interesting, alternating types each turn and being the strongest non Conditional Power Dark move in the game (and a good Physical Electric STAB), in theory condensing both STABs down to one slot. However, that's were the good ends. A BST slightly more than 2nd stage starters needs something amazing to justify it, like Dugtrio's Arena Trap, Alolan Sandslash's typing and Slush Rush, Marowak's Thick Club, Quagsire's typing and Unaware, etc. Morpeko, doesn't get anything except the rare Parting Shot, which don't get me wrong, it is fantastic, but Morpeko doesn't do anything else. Its speed is good, but misses the base 100 Benchmark common in many levels of play and its attack is usable, but it needs a boosting move, which Morpeko does not have. And while Morpeko's coverage pool is appreciable, its overwhelmingly underwhelming, preventing it from capitalizing on it.
And using Morpeko defensively is a pipe dream. Base 58 defenses across the board. Weak to Ground, Fairy, Fighting, all of which are popular coverage moves if not STABs. While Morpeko does get decent resistances (Flying, Dark and Steel are fantastic resists to have), it is so frail it can't utilize them well.
A pokémon too frail to take a hit and while decently fast and strong, it is only just that, decent. You would be better off looking for other Electric or Dark types as opposed to this tired reskin.