User blog comment:MarkvA/Sonic's Sidekicks: Who's The Best/@comment-3405448-20120409092731/@comment-109.78.21.27-20120410144142

shadow was really only introduced in sonic adventurebatle 2 were as silver was really only added in sonic the hedgehog on ps3 but personaly shadow was sort of a sidekick in the end of adventure battle 2 but silver never was :P