Thread:Digikeith/@comment-31365078-20200405073158/@comment-134861-20200406013308

The intent of the policy is to highlight the evolutions which are treated as "special" by the franchise.

For example, the very first Leomon card evolved from Biyomon and Palmon. This isn't because the authors designed Leomon, story-wise, to be an evolution of Biyomon or Palmon, it's because when that Leomon card was released, there were very few options and they needed to put something there. However, since then the fiction has decided overall that Elecmon is the "proper" Rookie for Leomon, as shown by it being called the Rookie form of Jeri's Leomon in the Digivice toy, or having Elecmon > Leomon in Re:Arise.

So, in order to separate evolutions that are "intended" from evolutions that are "we need to make sure this game is playable, so just roll some dice and decide what to code based on that", the Wiki wrote a policy that the highlighted evolutions (those in the infobox) would be those that are depicted or observed, rather than those that happen due to player interaction and choice.

For Tag Tamer, I can't find a guide online, and the evolution isn't listed on any other sites like wikimon. I think Lanate or TMS have Tag Tamer or its official guide, and could check.