The applicable Sync Pairs and reward rates are as follows: These bonuses stack additively, so having a team consisting of Elaine & Eevee, Penny & Sylveon, and Eve (Poké Kid ... again returning in this ...
A fan created a Ghost-type Eevee evolution, Halluceon ... the most recent of which is Sylveon, which was introduced in Generation 6. This makes it over a decade since the last new Eeveelution ...
Picking who to evolve Eevee into was difficult with only three options (Jolteon, Vaporeon, and Flareon in Generation I), and now there are several more options for Eevee. Sylveon is a solid choice ...