Extras

Early Boss Fights

Back in Time and Back in Time Equipped are two ways to reach the King Bulblin 1 Fight, one of the ways to set EBF. A full description can be found here.

New File with Bomb Arrows

Discovered by Razor7581

After performing Infinite Bomb Arrows, perform Back in Time. When you resume on the Bridge of Eldin, jump off to restore normal HUD, then savewarp. As with a normal BiT Save, you will respawn at the Faron Spring, but you will have a full bomb bag (30 bombs, 15 water bombs, or 10 bomblings), the bow, and a full quiver (30 arrows).

Notes:

• You must have three bomb bags in your inventory to transfer over bombs to the new BiT game file.
• The bomb bag that gets transferred is not yet fully understood. For best results, have all three bags filled with the type of bomb you wish to transfer.
• As you have bombs, arrows, and bombs arrows "early", it is also possible (with clever utilization of tricks), to get the Clawshot before entering the Forest Temple.

This video demonstrates the entire process after having unlocked Iza 2, with some loads/warps sped up for convenience.

New File with Bombs and Null Item

Discovered by Dragonbane0

It's also possible to bring back only Bombs by storing a null item in place of the Bow. After beating Lakebed and Midna's Desperate Hour, warp to Zora's Domain and descend to Upper Zora's River. Talk to Iza and Fight the Messengers as Wolf. After completing the fight, Iza's dialogue will be glitched, but she will still bring Link inside her hut.

This stores the bow and gives Link a lent bomb bag. Warping to Upper Zora's River will repeat the glitched dialogue and she will again bring Link inside her hut. This second time, the bow gets stored and also the real bow is replaced with a null item, and the lent bag becomes emptied. Warping UZR again repeats the process a third time; the null item gets stored and the lent bag is filled with 30 bombs and stored as well.

Performing Back in Time at this point will give Link the stored items on a Back in Time file; Link will have a permanent bomb bag with 30 bombs and a black rupee (null item, unequippable).

A video of part of this process can be seen below.