Back when I played FireRed, I hated how its Special Attack is so low that it can't use its Water STAB properly. It's Attack is high but all it has for physical moves were Normal attacks and Rock Slide.
The physical/special split benefitted Kingler a lot in terms of in-game viability. When I used it in my Pokemon Shield playthrough, it was surprisingly effective. It was the hardest hitter in my team thanks to its powerful Crabhammers and a base 130 Attack stat. Its physical movepool even got expanded this generation, giving it coverage such as High Horsepower. It also learns Protect via level up which allowed me to stall out Leon's Charizard's G-Max turns before Dynamaxing and beating it with a Max Geyser. An incredibly fun Pokémon to use and very much worthy of a teamslot.