1977 is one of the Spirits of the Years Past. As he represents the year he is named after, the ghost is dressed in ripped jeans and a loose vest as well as sporting a mohawk, indicative of the punk era that swept Planet Earth.
History
Along with the rest of the Spirits of the Years Past, 1977 was forced to run for cover when 1930 inadvertantly summoned the Time Waster. He arrived just in time to interrupt a conversation between Amy Rose, Tekno the Canary and 1950, saving them from the Time Waster's attack. 1977 then interpreted 1868's long-winded explanation, guessing that damage to the timeline had created the monster. He then went on to suggest that 1930 was planning on replacing 1999 as the Time Stream's next entrant.
Following 1930's change of heart, 1977 accompanied Tekno and some other ghosts to congratulate Amy for her words of wisdom. He was then the first to begin the New Year's Eve party.