Is “Sidekick” a Scrabble word?
Yes
SIDEKICK
Valid in at least one Scrabble dictionary
Valid in these dictionaries
SOWPODS / CSW
Scrabble UK & International
TWL / NWL
Scrabble North America
Large English Dictionary
General English word list
Meaning of Sidekick
/ˈsaɪdkɪk/
noun
1.An assistant to another person, especially to a superior or more important person.