* HeyItsThatVoice:
** ''Halo 3'' was the first videogame dubbed in Mexico (''Halo 2'' has Latin American voice acting, but it was dubbed by a Spanish-speaking studio in Miami, FL, and it was considered as really awful.) After the public outcry about that dub, Microsoft decided to dub the game in Mexico instead:
*** Master Chief is [[WesternAnimation/{{Futurama}} Bender Rodriguez]] and [[OnePiece Shanks]]
*** Cortana is [[WesternAnimation/KungFuPanda Master Tigress]] and [[Manga/DeathNote Rem]].
*** Miranda Keyes is [[Manga/{{Naruto}} Tsunade]] and [[WesternAnimation/{{Shrek}} Princess Fiona]]
*** Sgt. Johnson is [[Manga/DragonBall Frieza]], [[Manga/SailorMoon Tuxedo Mask]] and [[Manga/{{Naruto}} Might Guy]]
*** 343 Spark is [[Anime/NeonGenesisEvangelion Shinji Ikari]], [[Manga/{{Naruto}} Sasuke Uchiha]] and [[Manga/DragonBall Adult Goten]] (This is also HilariousInHindsight if you can consider that [[spoiler: he killed Sgt. Johnson or in context, [[Manga/DragonBall Goten killed Frieza.]]]]
*** The Prophet of Truth is [[Film/TransformersRevengeOfTheFallen The Fallen]] (Also count as HilariousInHindsight since [[spoiler:both characters are killed in almost the same way, but not before receiving a PreMortemOneLiner]])
*** Lord Hood is [[Manga/DragonBall Piccolo]] and [[WesternAnimation/ToyStory Woody]]
*** The Flood are [[WesternAnimation/TaleSpin Baloo]], [[WesternAnimation/HeManAndTheMastersOfTheUniverse1983 He-Man]] and [[ShamanKing Amidamaru]]
** [=HItV=] + EarlyBirdCameo: one of the soldiers in the opening cinematic (the one doing diagnostics on the Chief) is [[VideoGame/Halo3ODST Mickey]]--by which we mean, [[{{Series/Firefly}} Wash]].
** Additionally a Sergeant Reynolds, voiced by [[NathanFillion none other than...]]
** Coupled with an EasterEgg, [[http://www.youtube.com/watch?v=AWgvoaA96YA this video proves]] that [[Machinima/RedVsBlue Church and Caboose]] are alive and well in ''Halo 3''.