Because he uses a dragoncraft deck, he has a Digifriend called Draconir that looks like a mix of Coronamon, Dracomon, and Shoutmon and his ace Laevateinn Dragon is similar to Cryspaledramon and Slayerdramon.
Child stages represent their suits, with the Adults being the zords. That`s why the Stone Canyon Trio has the same Rookies but different Adults, as they start with the Thunderzords. Kat is the exception due to starting as a brainwashed Rita minion, with Meicoomon being her monstrous form. Later stages represent their new zords/powers as the season's progress.
The Ancients represent the elements of the Omega Rangers. AncientSphinxmon is outside of this rule, he's simply an Ultimate level sphinx for the Sphinx Zeozord.
Gokumon is Jason possesed by the Death Ranger. Since he loses the ability to morph after that, I adapted it as Agumon being reborn later as BushiAgumon for Zeo.
Aisha is sadly stuck at Perfect level due to leaving before Zeo, thus not getting her "upgrade". Also, lack of bear Ultimates.
Turbo powers were mostly not represented, I'm headcanoning it as a change of Digivice only. Except Kat, who had an open slot for Ultimate, and partialy Adam, as Kazuchimon's element also refers to Desert Thunder.
Tommy has a secondary line to represent all his powers up to Dino Thunder.