I hadn’t really played during this time but today I did and I encountered 2 shiny Pokémon: an oshawott and a kirlia. This made me wonder if the odds or increased or if I got insanely lucky at the 1/1200 chance
No, the 15-minute Happy Boost in Pokémon Cafe Remix does not directly increase Shiny chances. You just got insanely lucky.
Edit: oh sorry silver I didn’t see your comment until now. I just knew because I’ve played on my friend’s switch before and just to make sure I asked on Reddit later and I was right: https://www.reddit.com/r/PokemonCafeMix/comments/1l020cc/does_the_happiness_boost_in_pokémon_cafe_increase/
