Louie the Fourteenth

Half a century ago, long before smart phones, the internet or the current political climate, there were still bullies - and, in the town of Melville, Michigan, some believe, there was also a dragon. In fact, the creature named "Louie" that appeared in the fall of 1966 to protect nerdy freshman, P.J. Hayworth, wasn't a dragon at all, but the fourteenth in a line of "Khan Lu Wi" - genetically altered beings sent from the future to keep P.J. safe, so that he might someday save the world
Instead of protecting P.J., though, this creature seems to do the opposite - as P.J.'s life becomes more horrible every time Louie appears. While the school bully, Jimmy Wilson, nearly bullies P.J. to death and P.J.'s life only gets dramatically worse, the creature doesn't protect him at all - seemingly bumbling so badly any attempt to help P.J. that he finally rejects Louie completely.
It's only after a freak accident changes everything sinisterly for the worse that P.J. reluctantly realizes he has no choice but to turn to his "bumbling" protector - before it's too late.