OCG stands for Original Card Game, and represents the cards, rules, metagame, etc, used in Japan and Korea.
TCG stands for Trading Card Game and represents the above but for Europe, the US/CAN, and Australia.
The distinction is important for two reasons,
1 - Because Japan has a wider range of cards available, old and new, the metagame (the current popular cards and strategies) will be different from what is played in Europe, for example, at the same time. Sometimes a card is released that is TCG exclusive, powerful enough to change the metagame in a way Japanese players never experienced. Grandmaster of the Six Samurai is one example.
2 - OCG cards cannot be used in a TCG tournament, and vice versa. Historically some rules were also different, but should be the same now, in theory.
'OCG' stands for 'Original Card Game' and refers to the Japanese and Korean language cards and game rules, as opposed to the TCG which is the western version.
An 'advance summon' is the Japanese OCG term for what the English TCG calls a 'Tribute Summon'.
Yu-Gi-Oh! World Championship 2009: Stardust Acceleratordoes not contain any TCG exclusive cards. In fact, many cards in the game are OCG exclusive still, as they have yet to be released in the TCG.
Yes, all TCG cards are legal in all TCG territories. So you can use Spanish cards in the USA, English cards in Germany, etc. OCG cards (Japanese and Korean) are not allowed though. You can ONLY use any TCG cards as long as you have an English translation of that card. You CANNOT use any OCG (Official Card Game) cards (Japanese, Korean, Chinese) cards. So the only TCG (Trading Card Game) cards you can use would be Spanish, German, French, Italian etc cards like that. It's due to like the OCG and TCG having different releases.
In Yu-Gi-Oh!, OCG stands for the 'Official Card Game' that originated in Japan when Kazuki Takahashi created Yu-Gi-Oh! and Duel Monsters, while TCG usually stands for the 'Trading Card Game'. It's like the same thing, just that the TCG is what is played everywhere else in the world.
No, it is not a real card in either the TCG or OCG.
No, Gear Changer hasn't been released (yet) in the OCG/TCG.
There is no such card - 'Spell Sanctuary' is anime-only, no such card exists in either the OCG nor the TCG.
No. While it does also appear in Tag Force 5, it is not a real card, either in the OCG or TCG.
A 'release' is the Japanese OCG term for what the English TCG calls a 'tribute'.
'OCG' stands for 'Original Card Game' and refers to the Japanese and Korean language cards and game rules, as opposed to the TCG which is the western version.
An 'advance summon' is the Japanese OCG term for what the English TCG calls a 'Tribute Summon'.
Crimson Dragon is currently not a TCG or OCG card.
No, the card "Class Change"is not a real card in the OCG or TCG.
It is not a real card, neither in the English TCG nor the Japanese OCG.
No, there is no card in either the TCG or OCG of that name.
Korean cards are OCG and cannot be used in TCG competitions