Combination (合体) refers to the process where a Shinkalion unit combines with a support mecha or another Shinkalion unit to power up its ability and strength.
Link Combination

Link Combination (リンク合体) is where two standard Shinkalions combine with each other.
Cross Combination

Cross Combination (クロス合体) is where a standard Shinkalion combines with a larger-scaled Shinkalion, specifically the Shinkalion 500 Kodama, Shinkalion 500 TYPE EVA, Shinkalion Doctor Yellow or Shinkalion Hello Kitty.
Trinity Link Combination
The Trinity Link Combine (トリニティリンク合体) is where the three "700 Series" Shinkalions combine with each other.
Over Cross Combination

Over Cross Combination (オーバークロス合体) is where a MkII Shinkalion, specifically Shinkalion E5 Hayabusa MkII, Black Shinkalion Ogre and Shinkalion N700S Nozomi, combines with a standard Shinkalion.
- Shinkalion E5 MkII X Black Shinkalion Kurenai
- Shinkalion E5 MkII X E6
- Shinkalion E5 MkII X E7
- Shinkalion E5 MkII X N700A
- Shinkalion E5 MkII X 923 Doctor Yellow
- Shinkalion E5 MkII X ALFA-X
- Black Shinkalion Ogre X Kurenai
Z Combination

Z Combination (Z合体) is a new type of combination featured in the Shinkansen Henkei Robo Shinkalion Z season, where a Shinkalion Z combines with a Zailiner.
- Shinkalion Z E5 Yamanote
- Shinkalion Z E6 N’EX
- Shinkalion Z E7 Azusa
- Shinkalion Z 800 Sonic
- Shinkalion Z E5 Sonic
- Shinkalion Z N700S Hida
- Shinkalion Z 500 Osaka Kanjyo
- Shinkalion Z 500 μSky TYPE EVA
- Shinkalion Z H5 Hokuto
Super Z Combination

Super Z Combination (超Z合体) is a new type of combination featured in the Shinkansen Henkei Robo Shinkalion Z season, where a Shinkalion Z combines with another Shinkalion Z that has a mode change feature, specifically the Shinkalion Z Doctor Yellow.
Double Z Combination
Double Z Combination (ダブルZ合体) is a new type of combination featured in the final episode of the Shinkansen Henkei Robo Shinkalion Z season, where a Shinkalion Z combines with multiple Zailiners at the same time.