Yeah, all of this happens in the child timeline, where Twinrova wasn't killed. I agree with ZeldaZealot that it looks like MM - TP - FS,FSA - ALttP - OoX.

At the beginning of the Oracle games you can see the Triforce in a castle in Hyrule. Which means it probably takes place somewhere between the end of ALttP and the backstory of Zelda II, where the king decided to split the Triforce up again and hide the piece of Power in the Valley of Death. However, Twinrova is still alive here in this timeline, since Link never visited the Spirit Temple to fight her, and she tries to resurrect Ganon after he died in ALttP. His appearance with the pig form and the Trident of Power is the same here as in ALttP or FSA.