General Onox (The Legend of Zelda: Oracle of Seasons)
Tikal (Sonic the Hedgehog); via Master Emerald
Ixis Naugus (Sonic the Hedgehog)
Crystal Snail (Mega Man X2)
Bowser (Super Mario Galaxy)
Crystal Guardians (Adventure Time)
Dark Matter (Ben 10 2016)
Star Sapphires (Green Lantern)
Spyro (The Legend of Spyro)
Krazoa (Star Fox Adventure)
King Sombra (My Little Pony: Friendship is Magic)
Starlight Glimmer (My Little Pony Series)
Twilight Sparkle (My Little Pony Series)
Annie Leonhart (Attack on Titan)
Diamondhead (Ben 10 Series)
Diaspro (Winx Club)
Rhombulus (Star vs The Forces of Evil)
Prisma (Sofia the First)
Soul Caliber (Soul Caliber); to the entire world
Master Emerald (Sonic the Hedgehog)
Princess Zelda (The Legend of Zelda) trapped in crystal by Ganondorf.
Chaos (Sonic the Hedgehog), was imprisoned in the Master Emerald by Tikal for thousands of years until Dr. Eggman, having read ancient tablets describing the fall of the Echidnas and Chaos, released it by shattering the Master Emerald.
King Sombra (My Little Pony: Friendship is Magic), traps Twilight Sparkle in a ring of surrounding black crystals.
Starlight Glimmer (My Little Pony Series), trapped Twilight Sparkle and Spike in a crystal block.
Annie Leonhart (Attack on Titan) has encased herself in a crystal.
Spyro (The Legend of Spyro) has encased himself, Cynder, and Sparx in crystal.
Soul Calibur (Soulcalibur) is very dangerous to freeze the entire world in crystal.