3rd Generation Legendary Pokemon
Unlike the 1st and 2nd Generation of Pokemon, the 3rd Generation features the most Legendary Pokemon apart of one single Generation found within Pokemon GO. In total, the 3rd Generation introduces ten brand new Legendary Pokemon to Pokemon GO: Regirock, Regice, Registeel, Latias, Latios, Kyogre, Groudon, Jirachi and Deoxys. (Jirachi and Deoxys fall under the category of Mythical Pokemon, a given branch of Legendary Pokemon found within the Mainstream Pokemon Games.) As like all previous Legendary Pokemon in Pokemon GO, the 3rd Generation Legendary Pokemon, at one time or another, will eventually all be released within the game as Level 5 Raid Battle Bosses (some of which already have been). Some of these Legendary Pokemon will even be restricted to EX Raid Battles.