Eldritch guardian and a certain PFS flying lizard familiar boon

[Bob the summoner]

Minor PFS boon spoiler:

So I have the Draconic sidekick boon from #8-01: Portent's Peril.
My question is can a eldritch guardian make use of the boon.
It says "You may take a pseudodragon familiar as a familiar with the improved familiar feat as long as you are a SPELLCASTER of at least 5th level".
Meanwhile eldritch guardian says "At 1st level, an eldritch guardian gains a familiar, TREATING HIS FIGHTER LEVEL AS HIS EFFECTIVE WIZARD LEVEL FOR THE PURPOSE OF THIS ABILITY".

So, does a eldritch guardian count as a spellcaster for the purpose of the boon?

[Disk Elemental]

For purposes of that feat, the character is treated as a Wizard of equal level. Therefore, it'd make sense to treat them as one for the sake of the boon as well.

[Sebastian Hirsch]

Should work once you have the improved familiar feat

[ARGH!]

There is an faq that I will look for that says the arcane caster level prerequisite is archaic, and is satisfied by effective wizard level, so that other casters who get familiars such as shamans are able to take improved familiars. I will edit my post when I find the faq.

Edit: Improved Familiars: There are various ways for characters other than arcane spellcasters to gain familiars at this point, and some of those options even grant Improved Familiar as a bonus feat, but technically each Improved Familiar option requires a certain arcane spellcaster level to take it. Does that mean that non-arcane characters with Improved Familiar have a dead feature? How does it work? If it does work, can I take an Improved Familiar as some kind of variant familiar or a temporary familiar like the occultist’s soulbound puppet?

The Improved Familiar description was written back when only arcane spellcasters could have familiars, and it wasn’t sufficiently future-proofed. To that end, you can always substitute your effective wizard level for the purpose of determining your familiar’s abilities for “arcane spellcaster level” to determine the available improved familiars for your character. In general, you can take Improved Familiars for class-granted variant familiars like a shaman’s spirit animal, with a few exceptions: First, temporary familiars like the occultist’s soulbound puppet can’t become Improved Familiars from the Improved Familiar feat, and those class features don’t qualify you to take the Improved Familiar feat. Second, tumor familiars, as lumps of flesh in the shape of animals, can’t become Improved Familiars. In other cases, treat Improved Familiar as if it was an archetype to see if it stacks with other familiar options: since the two things it alters from a regular familiar are that it removes the ability to speak with animals of its kind and it prevents changing the creature type for non-animals, you couldn’t make a familiar that changes the creature type of non-animals or alters or removes speak with animals of its kind an Improved Familiar.