Throughout gaming their has always been a illustrious line up of the role playing heroes in the shadows that don't get quite the shine as their main buddy but are still epic and powerful. A lot of the times the sidekicks are even more likable.
. What is your favorite video game sidekick of all time?
My favorite Side Kick is Pikachu. Although sometimes it seems more like Ash is Pikachu's side kick
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Pikachu is cute, cuddly, ridiculously powerful, quick and i love him in smash bros. But technically in video games he is a side kick because your character plays main role of protagonist. It's hard to say though.
But for traditional well known side kicks. My favorite is Yoshi. Yoshi is loyal and brave and he takes his own life just to make sure mario makes the jump. He's the most heroic side kick for me.