So the Eidelon has no feats or skills of its own.
How about Multiattack? Kind of a complicated one, since if you don't have the requisite 3 attacks, it reverts to something that isn't a feat.
Three possibilities come to mind:
1. Fused Eidolon has three or more natural attacks: Nothing happens because the Multiattack feature would grant the Eidolon Multiattack feat and it can't have feats.
2. Fused Eidolon has one or two natural attacks: Multiattack feature grants the Synthesist extra natural attack at -5. (Fused Eidolon feature states that it grants the Summoner access to the Eidolon's special abilities).
3. Fused Eidolon has no natural attacks (not likely because each base form grants free natural attack evolution, but there is still possibility of losing them through devolution spell in certain circumstances): Nothing happens because there is no natural attack that could be made one more time at -5 penalty.
Three possibilities come to mind:
1. Fused Eidolon has three or more natural attacks: Nothing happens because the Multiattack feature would grant the Eidolon Multiattack feat and it can't have feats.
2. Fused Eidolon has one or two natural attacks: Multiattack feature grants the Synthesist extra natural attack at -5. (Fused Eidolon feature states that it grants the Summoner access to the Eidolon's special abilities).
3. Fused Eidolon has no natural attacks (not likely because each base form grants free natural attack evolution, but there is still possibility of losing them through devolution spell in certain circumstances): Nothing happens because there is no natural attack that could be made one more time at -5 penalty.
You don't think that possibly
4. Fused Eidelon gets use of the Multiattack feat at level 9 because it falls under the category of:
Special
This includes a number of abilities gained by all eidolons as they increase in power. Each of these bonuses is described below.
?
