His bodily appearance is the same as the other forms of BoBoiBoy's elemental personas, with having the same physique and cropped black hair. But unlike the others, BoBoiBoy Thunderstorm possesses scarlet eyes and is clad in mostly red and black. He wears his signature cap in a common style where the bill is at the front. The cap is fully black in color minus the three white 'horns' decorating the top, neon red lining adorning the rims of the bill, and his signature red lightning bolt insignia rests on the center of the cap. His vest that he zips halfway up is mostly black as well, with dark red linings on the hoodie, neon red jagged lightning-like patterns on either sides on the front. He wears a red shirt underneath the vest and its sleeves are 3/4 long with black cuffs. Fully black pants and shoes that are a mix of red and black to complete his attire.
Season 1He evolved from BoBoiBoy Lightning after being tortured by Adu Du, Probe and Computer by exploding balloons, his powers increased and transformed to Thunder but forgots himself as BoBoiBoy, soon, Adu Du and Probe tricked him that he is his best friends and even forced him to destroy his friends and otherselves so he can get Tok Aba's Secret Recipe, he was cured after Probe said "Yeah, awesome!".
- Thunder Blade (Pedang Halilintar) - a bladed weapon he can use to attack foes.
- Thunder Ball (Bola Kilat) - used to trap and shock enemies, he used it against Ying, Yaya, Gopal, BoBoiBoy Wind, and BoBoiBoy Earth.
- Lightning Speed (Gerakan Kilat) - used to move faster which is 31.25% faster than Ying.
- Thunderstorm Sprint (Pecutan Halilintar).
- Lightning Shine (Kilauan Kilat) - used to blind an enemy temporarily.
- Thunder Kick (Tendangan Halilintar) - he used it in the Football Game between him and Fang.
- Thunder Shield (Pelindung Halilintar) - used to protect himself from Pak Senin Koboi's Crazy Cat.
- Thunder Blade Slap (Tusukan Pedang Halilintar) - used to struck the Shadow Tiger, he also attempted to struck BoBoiBoy Cyclone, but missed him.
- Thunderstorm Attack (Tetakan Halilintar) - used to defeat the Sleeping Monster and attack Mukalakus.
- Lightning Slash / Thunderstorm Slash - seen in BoBoiBoy: The Movie.
- Thunderstorm Rain (Hujan Halilintar) - Can produce thousands of Thunder Blades from the sky when strucked by a single Thunder Blade.
- Mega Thunder Blade (Pedang Mega Halilintar) - a gigantic Thunder Blade used to defeat Petai.
- Thunder Spear (Tombak Halilintar) - His new weapon in BoBoiBoy: The Movie. Long spear with lightning at the top and bottom.
- Thunderstorm Vortex (Pusaran Halilintar) - he spins his Thunder Spear round and round, creating a vortex of lightning and then thrusts his target.