Turtonator

Turtonator carves a small niche as a Fire-type on hyper offensive teams over the more commonly seen Charizard thanks to a great boosting move in Shell Smash, which allows it to outspeed most of the unboosted metagame, making it difficult to revenge kill reliably. An excellent STAB combination along with high-powered STAB moves and valuable coverage in Flash Cannon makes it incredibly dangerous after a boost. However, Turtonator is held back by its low Speed, meaning it will most likely take heavy damage before safely setting up. It also has issues breaking through many top defensive Pokemon such as Gigalith, Wishiwashi, and Jellicent. Along with this, even after a Shell Smash it is still outsped by the commonly seen Ribombee as well as Choice Scarf Pokemon such as Mesprit, and it will either have a drop in its defensive stats after a boost or take heavy hazard damage upon switching in, depending on which item it's using.