I have the legolas and gimli mounted mini but can't find any rules for this model???
Move distance? Does having two riders affect speed?
Attacks? Do both heroes attack on same charge etched or does one support?
In mount? If you have to roll on thrown table fo u roll individually or as one?

I suppose the arwen frodo model would fall into these queries also

It counts as Legolas (or Arwen) riding the horse, carrying Gimli (or Frodo) as a passenger. I don't remember what this does in terms of combat or anything, but there are rules in the rulebooks.

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See my WIP thread here. viewtopic.php?f=50&t=25624

It does not have a profile. Gimli is just a passenger and does not fight at all. You can actually ignore him. When models win against Legolas they may choose to hit Gimli instead though. Even if they didn't fight Gimli in the first place.

In competitive games the 'passenger rule' is even forbidden. So the model from Legolas and Gimli just counts as a Legolas Mounted.

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MEMM I: 4th (Mordor+Harad) MEMM II: 4th (Galadhrim) MEMM III: 2nd (Thorin's Company)