Ho Oh, Wiki

Judge A Pokémon: Wingin' It - Smogon University

Ho-Oh Smogon Forums

ORAS Ubers - I feel like a monster

Ubers Spotlight: Zygarde - Smogon University

Ho-Oh Gen 2 Best Moveset - Ho-Oh Best Moveset Moves Pokemon Gold Silver Crystal

Why was Ho-Oh in the first episode of Pokemon yet didn't appear in the video games until Gen 2? - Quora

Metagame - Ubers Metagame and Set Discussion v4 - DLC 2 Edition

New and flavorful abilities for the Gen 2 legendaries. The beasts were tweaked from my previous post, and then Ho-oh and Lugia were designed to be focused on double battles : r/stunfisk

Ubers - Eternatus

Ubers Smogon