i know it was on the nintendo 64 (i think 99,99% sure)

basically the game is based around roller skating your a pizza delivery boy (dont really remember much of the story) i do remember you did roller skating races and at one point there was 4 selectable characters but one of them gets kidnapped by zombies if i remember right

Sounds like it could be pro skater.
I never cared for games like that though, so my knowledge on it is very little.

didnt had anything to do with tony hawks games.

t'was jet set radio ... googled it lol but im such a noob its made from xbox.

jet set does not involve rolling around getting kidnapped by zombies in the start of the game.......
only got to like stage 10, but even there, nothing about pizza, the game is all about grafitti and tagging it up before you get caught by the cops.

Euhm pretty suee at one point of the game u get kidnapped by zombies or mummie forgot and that the guy old job was deliveryng pizza