If the player switches out Gotenks (SSJ3), the character can be heard saying "Peanut Butter Jelly Time". This is a reference to the internet meme of the same name, which was popular around Tenkaichi 3's release.

Super Saiyan 4 Vegeta's Final Shine Attack is incorrectly colored Blue in this game, in Dragon Ball GT (where the attack comes from) it's green. What's strange about this is the fact that in it's predecessor this attack is the correct color.

During the "The Cell Games Begin" match in Dragon History mode, the subtitle for Cell's line "why don't you pop one of those Senzu beans" mistakenly omits the "s" in "beans".

During the "Frieza's Ultimate Transformation" match in Dragon History mode, Frieza's line "now witness the power more fearsome than death itself" is mis-transcribed as "now witness the power, more fearsome AND death itself."

During the opening "Common Enemy" match in Dragon History mode, the subtitle for Raditz's line "you are a disgrace to our race" mistakenly reads "you are a disgrace to ALL race".

By entering a Dueling Match with any character that has an electric aura around them and then choosing to fight again once the match is over, they will no longer have an aura around them.

Through the use of a glitch involving Broly with the "Secret Measures" potara equipped, it's possible to get inside of the Kame House without destroying it.

Whenever a Great Ape throws a rock, it is spelled "Gigant" instead of "Gigantic".

In the Character Reference section, Chi-Chi says that she would like to have met Grandpa Gohan. However, she met him in the last episodes of Dragon Ball. The game might be disregarding this, as it was anime-only filler.

In "Dragon History", the game's story mode, during the fight with Nam, Mr. Satan/Hercule is shown on the signs and blimps even though he is not the champion at that point in the story. This can be attributed to the stage being more or less the same throughout the series, so making a whole new stage without Mr. Satan/Hercule just for this scenario would be wasteful.

Nuova Shenron is spelled two ways. On the character selection it's spelled 'Nuova Shenron', but in the GT saga, the subtitles for Goku spell it 'Nova Shenron'.

When Goku (GT) uses the Solar Flare attack, he says "Taiyoken", the Japanese name for the attack.

While waiting on the menu screen of the story mode, various characters such as Piccolo and Krillin will occasionally appear and engage in conversation with Goku.

Gogeta (Super Saiyan 4)'s Character Introduction reads "He is a warrior without peer, and demonstrates this by performing this by performing his ultimate move the "Big Bang Kamehameha", repeating the "this by performing".

When Goku (Mid) uses the 20x Kaio-ken Kamehameha, the technique's name appears spelled "20x Kaiken Kamehameha" on the screen.

When on the character selection, Vegito is spelled with an "I", but on the transformation options for Vegeta (Second Form) and Goku (End), it is spelled "Vegeto".

When GT Kid Goku turns Super Saiyan 4 against Nuova Shenron in Story Mode, Goku's voice will still be a kid during the in-game cutscene.

Majin Buu's Character Introduction reads "In Dragon Ball GT, Buu fights against" - and ends there, leaving out the remainder of the information.

In "Destined Battle: Goku vs. Vegeta", the first level of the Majin Buu Saga, the word "purposely" is misspelled "puroposely" in the description.

Vegeta (Scouter)'s second and third attires have no tail, but he can still transform into a Great Ape. This is odd as, according to the story, Saiyans require their tail to transform.

The PS2 version has an exclusive feature called Disc Fusion which unlocks battles in Ultimate Battle.

The Wii version exclusively has the Dragon Net Battle mode, to allow online play.

Krillin's Destructo Disk is normally yellow, but if Android 18's Destructo Disk is being used and Krillin uses his, the disk will be pink.

When Baby Vegeta (Super Baby 2) uses the Final Flash Technique, he instead yells "Big Bang Attack".

If Zangya beats Krillin, Master Roshi, or Nam, she says "Don't cha wish your girlfriend was tough like me? Don't cha?" This is a reference to the song "Don't Cha" by the Pussycat Dolls and Busta Rhymes.

Frieza's move "You Might Die This Time" is mistakenly called "I Might Die This Time". This error is fixed in later games.

Sometimes when Shenron or Ultimate Shenron is about to grant a wish, he will say "That is a wish I cannot grant.", and yet will still grant it anyway.

The opening music to the game is "Super Survivor" by Hironobu Kageyama in the Japanese and European releases. The American releases uses an instrumental version.

In the Italian translation of the game, during the intro of the "Dragon Fist Explosion! If Goku doesn't, who will?", the game states that "Goku explodes with a new attack special attack to stop Majin Buu" when it should say Hirudegarn.

The Japanese release features remixed music from the anime, while the English release has original music made for the game.

If Nuova and Syn Shenron fight each other, Nuova will refer to Syn as "Omega Shenron" in his pre-battle introductory speech. This may be because in the anime, Nuova only fights Syn in his Omega form.

If you wait long enough in the versus menu, Nappa will ask Vegeta "Hey uh... Think if I went Super Saiyan, my goatee would grow?"

Arale Norimaki, a character from Akira Toriyama's Dr. Slump series, is featured as a playable character.

If Piccolo enters a tournament, his screen name will be MaJunior, as it originally was in the series. In a similar fashion, the screen name will be Shin if one enters the tournament as Supreme Kai.

Budokai Tenkaichi 3 features 161 characters, the largest character roster in any Dragon Ball Z game, as well as almost the largest in any fighting game, only being topped by Tobal 2.