Arbormon: Spirit Evolution tree

Names link to DigimonWiki/Fandom (Fandom community, CC BY-SA unless noted otherwise); artwork © Bandai, via the official Reference Book. Card labels show the Spirit tier; edge colors show the Spirit trigger. Frontier has no partner Digimon: Cherubimon gave life to the H Spirit of Wood as Arbormon, who already held the B Spirit to become Petaldramon; AncientTroiamon is the Warrior of Wood who left those Spirits (lore links, not steps). No Fusion of the Wood Spirits is recorded. In episode 35 Takuya unifies the Spirits of Wood with four other Warriors' Spirits into EmperorGreymon (see panel). In episodes 48 to 50 Takuya and Koji, and in the last one all five children, merge with the ten Warriors' Spirits into Susanoomon; the tree draws it from EmperorGreymon and Koji's MagnaGarurumon (see panel), which hold those Spirits, as the Hybrid-Digivolving figures do. AncientTroiamon and Susanoomon are DigimonWiki's names for the official AncientTroymon and Susanomon.