It does get perfect coverage with just STAB's alone :) Shedinja screw the wannabe Mega Lopunny
It's like GameFreak was so nervous with some 'Mons. Like not giving Kommo-O Close Combat or Crabrominable any speed, or the Tapu's Play Rough, or Bewear Close Combat because they afraid of having OP stuff this Gen. Then, by the end of the Dex, the designers were way too tired of having to constantly keep things in careful consideration, so they just stopped giving a fuck when they made this lol. Best offensive typing by a landslide, optimal Stat spread, technician priority, a signature move that just gives you way more than it should (and for no real reason), and then just toss on the elemental punches for some 4x SE moves because why the hell not.