2009-10: Tikkinen skated for the Espoo Blues U18 and U16 teams in Finland. In 15 games for Blues U18 he scored 3 goals with 1 assist and had 8 penalty minutes. Tikkinen played in one U18 playoff game for the Blues squad that reached the bronze medal game and had one assist. In 12 games with Espoo's U16 team he scored 9 goals with 15 assists and had 6 penalty minutes. After finishing sixth, Blues lost to TPS in a three-game playoff series. Tikkinen scored 2 goals with 3 assists and had 2 penalty minutes in the series with TPS.
2010-11: Tikkinen appeared in one game with Espoo Blues' U20 team and was an assistant captain for the club's national champion U18 team. He represented Finland at the 2011 U17 European Youth Olympic Festival. He was scoreless in his only U20 game. In 34 U18 games, Tikkinen scored 8 goals with 23 assists and had 8 penalty minutes. After finishing second in the regular season, Espoo's U18 squad defeated TPS in the playoff finals. In 13 playoff games Tikkinen scored 3 goals with 4 assists and had 6 penalty minutes. Tikkinen had 4 assists in three games for Finland at the EYOF tournament.
2011-12: Tikkinen converted from forward to defense and played in 39 games with the Espoo Blues U20 squad after opening the year with the U18 squad. He represented Finland at the 2012 U18 World Junior Championship. Tikkinen scored 8 goals with 15 assists and was minus-one in 39 games for Espoo's U20 team. After finishing second in the regular season Espoo fell to HPK in a four-game series. Tikkinen was plus-four with 1 assist in the HPK series. He scored 3 goals with 9 assists and had 32 penalty minutes in seven qualifying games for Espoo U18. In nine U18 playoff games he scored 2 goals with 8 assists and had 12 penalty minutes as Espoo won a silver medal. In seven games for fourth place Finland at the U18 WJC he had 2 assists and was plus-one with 4 penalty minutes. Tikkinen was ranked 17th amongst European skaters in Central Scouting's final rankings prior to the 2012 NHL Draft.
A converted forward, Tikkinen is smallish defenseman who has all of the skills that you would expect of a diminutive blueliner. He is an effortless skater who is at his best in transition thanks to his speed and puck skills. He is very much an offensive rearguard possessing the vision and passing of a dangerous power-play quarterback.
Tikkinen will look to move up to Espoo in the SM-Liiga where he will need to rely on his strong skating against the much bigger and stronger competition. Needs to add size and strength and improve his defensive ability.