2nd Generation Legendary Pokemon
Within the 2nd Generation of Pokemon, there are exactly six Legendary Pokemon: Raikou, Entei, Suicune, Lugia, Ho-Oh and Celebi. (Celebi falls under the category of Mythical Pokemon, a given branch of Legendary Pokemon found within the Mainstream Pokemon Games.) As like all Legendary Pokemon in Pokemon GO, the 2nd 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.