- Capsule TAMAGOTCHI x IKKS - White T-shirt for boy - Round neck, short sleeves - Mametchi visual in embroidered sequins - Low bust woven label on back - IKKS #actforbetter: material contains 100% organically grown cotton TAMAGOTCHI and IKKS have teamed up for an exclusive capsule collection featuring six unique pieces. This white organic cotton T-shirt for boys is brought to life with the character Mametchi, recognizable by its yellow color, in embroidered sequins. Ambitious and energetic, he loves studying, and play sports.