Though whoever designed the card should have learned a bit about consistency. One part of the card says that only
companions can bear it, while another allows to transfer it to any culture companion (provided it has Fellowship keyword), effectively making it an in-eligible bearer.
Not Decipher's strong point in their final sets -- see
Whisper in the Dark.
Bill the Pony should subtract 1 from an underground site's twilight number before he is discarded, per Decipher's clarification. Yet... he does not.
EDIT: Link to Decipher's clarification on Bill the Pony: http://lotrtcgwiki.com/rules/faq.pdf
Unfortunately, this "clarification" contradicts other rules of the game, specifically the one describing in detail the movement procedure. I'm all for making Bill the Pony working as described in the clarifications, but I either have to change the rules (which might mess up other cards, so I'd rather not do that), or change the "text" of Bill the Pony. At the moment, it's discarded when player's marker is moved to the new (underground) site, which happens waaaay before twilight is added.
I've looked through the comprehensive rules and they say regarding movement:
• A Shadow player places the next site card, if needed.
• Move your player marker to the next site.
• Perform "When you move from..." actions.
• Perform "When the fellowship moves..." actions.
• Perform "When you move to..." actions.
• Add twilight tokens equal to the new site's Shadow number.
• Add 3 twilight tokens if the new site is in region 2; or 6 if it is in region 3.
• Add 1 twilight token for each companion.
So my guess is that, unless we have other cards that hinge on the distinction, the Fellowship is not actually AT the site until they've completed the last step (adding twilight for companions). In that case,
Bill the Pony would still work. Of course... moving the player
marker should count, but... *shrug*
The other possibility is that the Shadow number of the site is calculated
before the move starts.
Any chance to code it to make the card work as Decipher intended?