He is a neutral meaning not good or bad.
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Waluigi is bad. Probaly not as bad as Bowser , but more cheating/bad. He is Wario's sidekick and was made just so Wario would have a partner in Mario Tennis. He is Luigi evil counterpart and nemesis. "Wa" in Japanese means bad , hence the name Waluigi.
It depneds what you mean by "good". If you mean good as in being good , then no he is bad. He is Wario's sidekick. But if you mean good as in awesome , then that's your opinion.
Waluigi's symbol is a flipped L because he is a flipped Luigi whos symbol is an L. For example: Luigi is good, Waluigi is bad (most of the time) Luigi is tall and has a little moustace and Waluigi is REALLY tall and has a REALLY short moustace.
Bad
His rival is probably Luigi.The game Mario sluggers and mario tennis is an example of waluigi trying to be evil with his former partner wario.In reality they are quite daft charatures so most of the games are based on rivalry.
bad guy
Good guy with good intentions but bad ideas.
a good guy
Good guy
good guy!
I Don't See him he do good or bad
Magneto is the good guy, but he's a sort of a good bad guy.