Destructo Disc (LV1)
Krillin's trademark attack, an energy projectile flattened to razor-sharpness. You can hold the Punch button for as long as you want, it keeps the disc above Krillin's head and can act like a protective umbrella of sorts. Releasing the button launches the disc, which is flung across the screen at great speed. It is blockable, but does higher-then-average block damage. Also, delaying the throw does not power up the disc when thrown. You can change it's trajectory with the directional buttons upon throwing the disc. Holding forward makes it travel forward faster and holding back slows it's speed a bit. Holding Down arcs it down a bit while holding Up arcs it upwards. You can combine these features by holding the diagonal directions (Up-Forward, Down-Backwards, etc).
Orin Combo (LV1)
A rising chain of attacks ending with a powerful double hammer smash, knocking the opponent to the ground hard.
Blasting Bullet (LV1)
Krillin fires a twin energy beam forward, which knocks the opponent into the air upon impact. If they block it or they otherwise evade it, it'll fly past them, only to turn around offscreen and come back, hitting them from behind. The same happens if only one of the two beams hits. The other one will return for a second attempt! If they try to jump it, it'll curve upwards and hit them in the air. Pretty nifty technique!
Scattering Bullet (LV2)
Though a souped-up version of the Blasting Bullet, it works a bit differently. This beam always curves up on its own and when in mid-air, breaks apart into a volley of scattering, falling energy balls raining down upon whoever is unlucky enough to be underneath it.
Kamehameha (LV2)
Krillin's version of the Kamehameha can only be performed while in mid-air, and is launched straight forward. It pushes the opponent against the wall.
Solar Flare x100 (LV3)
Full screen hitting attack (that can be blocked), this great Solar Flare is so bright it casts the entire screen in white, turning the fighters into silouettes. Krillin then delivers a shadow dancing assault on the stunned opponent.

When performed during Confident Mode, it ends with one of these different Finishers, depending on how far your Confident bar is filled;
Lv1 - Triple Trouble.
Lv2 - Chasing Kamehameha.
Lv3 - Destructo Disc Barrage.