Where is last blue trinity?

The last trinity should be at Hollow Bastion, on a balcony after you take that giant lift outside the castle in front of the Heartless emblem.

But if that's not the one, here's a quick list of the Blue Trinities:-
1) Traverse Town - Near the candles
2) Traverse Town - Near the World Exit door
3) Traverse Town - Walkway behind Lady and the Tramp fountain, 3rd District
4) Traverse Town - Inside Merlin's house
5) Wonderland - Near giant tree at Lotus Forest
6) Wonderland - In area accessed by lilypads at Lotus Forest
7) Coliseum - Near base of left statue
8) Coliseum - Near base of right statue
9) Deep Jungle - At camp site near lab
10) Deep Jungle - Area where Jane gets kidnapped to
11) Agrabah - Area North of Aladdin's house, with Pot Spiders/Black Fungus
12) Agrabah - One of the lower water chambers in the Cave of Wonders
13) Monstro - Plank at water level at entrance
14) Monstro - Chamber 5/6
15) Monstro - In room before final boss battle
16) Hollow Bastion - Dungeon with either Black Fungus/4 Darkballs and a Defender
17) Hollow Bastion - Area after taking giant lift

Ok thx ill print it off
THX THX THX THX THX THX