Crystal Snail

Crystal Snail, known in Japan as Cristar Mymine (クリスター・マイマイン), is a snail-type Maverick in Mega Man X2. His origins and motives are a mystery; regardless he guards the Energen Crystal mine under Sigma's command.

Strategy
Besides using Crystal Hunter, Crystal Snail also uses his shell to his advantage. His weakness is Magnet Mine, which knocks him out of his shell. Once he is out of his shell, the player can dash at it to knock it away. Snail will try and follow it; the player can essentially play keep away with him for the entirety of the battle. If Snail and his shell collide with each other, he will receive double damage.

A unique trick can be utilized in this battle: place a Magnet Mine on the wall behind X, and then shoot another mine at Crystal Snail — not only will it knock him out of his shell, but he'll fly right into the other mine.

Mega Man X2 stats

 * Height: 166 cm (5'5")
 * Weight: 98 kg (216 lbs)
 * Power: 6800rp
 * Speed: 500rp

Rockman X2 manga
In the manga, Snail is a henchman of Sigma. After a test run with his new body, an unsatisfied Sigma orders Snail to occupy a crystal mine and extract more Energy Crystals, which keep Reploids functioning and also increase their output potential. Snail happily complies with this request, not only out of his loyalty to Sigma, but because the aesthetic beauty of the crystals allows Snail to forgot his own physical unsightliness.

X realizes that Sigma is using the mine as a power source, and attacks it. After destroying some small Maverick guards, X confronts Snail, and they battle each other. Although X proves to be a formidable opponent, Snail gains the upper hand by using his powers to freeze X in place. As he retracts into his shell and charges at X for a killing blow, X is able to break free of his temporal trap through sheer willpower and a strong desire to live and fires off a point-blank charged shot at Snail. Snail is fatally injured and dies in defeat, and X cries in agony that his duty as a Maverick Hunter has forced him to take another life, even that of a dangerous Maverick like Snail.

Archie Comics
Crystal Snail appeared in the Mega Man comics, specifically in the Worlds Unite crossover event that saw Mega Man X characters appear in the Archie Mega Man series and interact with characters from Archie Sonic the Hedgehog, Sonic Boom, and various other Capcom and Sega franchises such as Street Fighter and Alex Kidd. He appeared as part of an army of Mavericks sent to conquer various worlds.

Trivia

 * Crystal Snail, along with Bubble Crab, are the only Mavericks from Mega Man X2 that do not appear in the Mega Man Xtreme sub-series.
 * His Japanese name "Mymine" comes from the word "maimai (マイマイ)". This is another name of "katatsumuri (カタツムリ)", which is snail's Japanese name.