Pokemon GO Catch Mastery Archen is a one-day event focusing on the First Bird Pokemon, Archen. The Gen V Rock- and Flying-type Fossil Pokemon will be available as encounters from the event-themed Field Research, Timed Research, and paid Timed Research. Moreover, there are two other Fossile Pokemon available as wild encounters during Catch Mastery Archen.Besides this event, Pokemon GO trainers are currently also enjoying the offerings of the Festival of Colors 2025, which marks the debut of Shiny Bruxish. Lucky trainers may also encounter a Shiny Smeargle during this event.Pokemon GO Catch Mastery Archen event overviewDate, time, and event bonusesCatch Mastery Archen is taking place on Sunday, March 16, 2025, from 10 am local time to 8 pm local time. The event bonuses are:Increased chance of encountering Shiny Omanyte, Shiny Kabuto, and Shiny Archen.2× XP for successfully catching Pokémon with Nice Throws or better.2× XP for successfully catching Pokémon with Curveball Throws.Wild encounters and event researchThe wild encounters that enjoy a boosted spawn rate during the event are:Omanyte [shiny encounter available]Kabuto [shiny encounter available]Note that the Catch Mastery Archen event also includes themed-Field Research, Timed Research, and Paid Timed Research (US$2.00) questlines for trainers to complete and reap rewards from.Check out other Pokemon GO guides:Ditto disguisesBuddy Evolution Adventure Together guideBest Fast Attacks in Pokemon GOSierra countersCliff countersArlo countersGiovanni countersTeam GO Rocket Grunts