I asked ChatGPT-5.6 about those last two trophies. Edited for brevity:

The trophy system works like this:

1. Every applicable level stores an inactive type-$7F object in slot 1.
2. A level’s secret puzzle sets bit 7 of event byte $CCBA.
3. The common routine at bank 0: $3D50 notices that bit and sets bit 0 at $C675, activating the trophy.

I enumerated the direct and table-driven code paths capable of introducing $CCBA.7. Neither suspect level selects one:

• Weight For It!, level ID $14, has event-table entries that set only $CCBA.0 and $CCBA.1.
• Jungle Jumps, level ID $15, sets $CCBA.0, $CCBA.1, and $CCBA.2. Its completion routine at bank $7C:$771A checks whether those three bits equal $07, then sets $CCC6.7 - a different flag used for level completion. It never sets the trophy bit.
• The event tables do contain $80 entries for other levels, demonstrating that the missing entries are significant rather than a disassembly artifact.

So the trophy entity and global spawning machinery work; there simply is no legitimate way for gameplay in either level to request that spawn. This explains the long-standing community observation that Weight’s trophy exists but cannot be spawned, while Jungle’s is not in bounds and cannot be spawned. It is also consistent with an incomplete port: the N64 versions use red-ring and blue-ring challenges for these levels (N64 achievement descriptions), but the corresponding GBC trigger logic was not connected.

Insanely good board

Looks like somebody beat this with a 15:52:

Wonder who this was :)

<3 TGH