She then used it as part of a lecture, during which it battled a Trainer's Machamp and defeated it.
She first used it to help Ash get his Charizard under control. In The Mandarin Island Miss Match, Prima owns a Slowbro. It then defeated Team Rocket with a powerful Mega Punch while they were trying to steal Westwood V's Pokémon. In The Evolution Solution, Professor Westwood V's Slowbro evolved from a Slowpoke at Seafoam Island. Galarian Slowbro is the only known Pokémon capable of using the move Shell Side Arm. Slowbro releases the poison liquid by grabbing Shellder's tongue who launches it. Galarian Slowbro can move with speed that puts the quickest of known reflexes to shame in order to fire a liquid poison shot from Shellder's tip. While normally zoned out, its expression will quickly change when facing a strong opponent due to the stimulus jolt from its nervous system. Galarian Slowbro are considered highly dangerous due to it indiscriminately attacking its surroundings the reason for which is due to Shellder sometimes unconsciously biting down hard on its arm. Its mouth and paws are also purple, while its belly remains gray. It has a slight color difference with purple spots on its forehead. The Shellder attached to its arm resembles the Shellder tail from its Kantonian counterpart but smaller with a purple tip shaped like a stinger and even lacks pupils. In Galar, Galarian Slowbro's appearance is due to Shellder biting its arm instead of its tail, causing a chemical reaction with the consumed Galarica spices within its body. Slowpoke is virtually unchanged, but it gains some power and motivation from Shellder's digestive fluids. This allows it to act as armor so hard that nothing can scratch it. Mega Slowbro's energy has gathered into Shellder, which has increased its hardness.
The spikes on the Shellder are now reduced to four on the bottom section of its body and the dark spots only visible on its middle section. It can move by bouncing, using its tail as a spring. Mega Slowbro balances on its tail due to its legs being engulfed. The spiral Shellder now has an opening at its tip, allowing the tail of Slowbro to stick out. Its head pokes out of the mouth of the Shellder and is surrounded by Shellder's now larger teeth. When Slowbro Mega Evolves, it becomes engulfed by the Shellder so that only its head, arms, and white-tipped tail are visible. Slowbro tends to live near ponds, lakes, and seashores. Because it can no longer fish using its tail, it instead swims to catch its prey and allows the Shellder to feed on its leftover scraps. While it is capable of unleashing powerful psychic attacks, Slowbro is typically rather peaceful and usually prefers not to fight. While typically lazy and unintelligent, Slowbro apparently becomes inspired when the Shellder bites down on its tail. Slowbro has lost the capability to feel pain due to the Shellder's poison. If its tail or the Shellder attached to it is broken off, Slowbro will revert to its unevolved form, Slowpoke. Shellder developed its spiral form in an effort to suck more sweetness out of Slowbro's tail. There are several spikes across the surface of the Shellder, and it holds onto Slowbro with many sharp teeth. This Shellder has a gray, spiral shell with darker gray spots and small, triangular eyes near the base. There is a Shellder attached to its tail. It has three clawed fingers on its hands and two clawed toes on its feet. It has large, vacant eyes, curled ears, and two small pointed teeth protruding from its upper jaw. Slowbro is a bipedal, pink Pokémon with a tan, striped belly and a rounded, tan muzzle.