A native of Gällivare, Sweden, Sandin Pellikka split the 2021-22 campaign between Skellefteå AIK's under-20 and under-18 teams. He tallied three points (1-2-3), a plus-three rating and six penalty minutes with the under-20 group, in addition to 21 points (9-12-21) and 12 penalty minutes in 30 contests at the under-18 level. Sandin Pellikka has developed with Skellefteå AIK since 2019-20, notching 39 points (17-22-39), a plus-18 rating and 70 penalty minutes in 45 games at the under-20 level, 22 points (9-13-22) in 40 games with the under-18 team and 12 points (3-9-12) in 24 games for the under-16 squad.