Whenyou get them all, go to Makyo Town and talk to the old man near the tower so you can summon Shenron (Lvl 60). You'll only be able to encounter him once and the Dragon Balls will disappear forever, so this is your one chance to capture him! You won't be forced to use the Dragon Balls, though, so only give them to the old man when you're ready to catch Shenron (and be sure to save the game beforehand!).
Bicycle: You don't have to pay 1 million Zeni of course. You need the bike voucher given by the chairman of the fan club in Red Ribbon Base. Give this voucher to the shopkeeper in Namek Town (in the bicycle shop). It's the same method in Fire Red.
03 Surf: As of version 1.5, HM03 has been replaced by the Turtle Bell, which is an item that allows you to summon a turtle to ride on the water. This item can be found in the Babidi Zone, at the same place you would normally find HM03.
After inserting the master code, put the code of the Pokemon which matches the Fighter you want. The list of the codes is here. The codes of some Fighters don't match their Scouter numbers. Instead, you need to use their "IDs", which can be found on the Fighters page. For instance, Whis' ID is 131 (don't use the Scouter #!), so you would just use the code of the Pokemon n131 i.e. Lapras, which is 483AC796 E3850B8F. It's not too complicated.
If you're on Android: Use the emulator MyBoy and go to Settings, advanced, cartridge type and choose 128k. For some players this still doesn't work, even after the patch, but a workaround has been found. Go to settings, & Link Local. Open up the same GBA rom. For whatever reason this bypasses the 1M message, & when the game starts, you can save. Once you save, open the 1st rom you started, close it, & play from the second one you opened. Unfortunately, the emulator GBAoid does not allow in-game saves for DBZ: Team Training at all.
Or for a similar result, for the MyBoy, download a version of Pokemon Fire Red -> Play the game until you can save -> Go to file manager and rename the pokemon fire red file as "Dragon Ball Z-Team Training.sav" or however you named your Dragon Ball Z Team Training Rom.
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