Takeru "T.K." Takaishi
He is Matt's younger brother (Well, half brother anyway.) and the most knowlegeable about the digi-world when the original 6 digidestined aren't around.
Attacks: Bubble Blow
Attacks: Boom Bubble
Attacks: Shooting Star, Silver Blaze
Attacks: Hand of Fate
Attacks: Gate of Destiny
Attacks: Seven Heavens, Testament