Where is Teddy when you find him?
If he's falling out of the bed and onto the floor, try a bedguard.
If it's just under the covers, to be honest this sounds like more of an excuse for waking you, rather than a read on for waking you.
While there might be the odd occasion that she searches and can't find Teddy, at 2.5 she should be able to look and find it herself really. Especially it its it's in an easy-to-grab place.
Does she need a light so she can see to find it?
I would stop finding it for her. Still go in when she calls, but get her to do the finding. Make suggestions if she looks at your blank (Is Teddy under your covers? Is Teddy on the floor?) But mostly encourage her to use her initiative and find it without your input, then praise when she does.
I suspect though, when she realises that the lost Teddy route isn't working, she'll start being thirsty and needing a drink, needing the toilet, or just feeling scared... just an excuse to get Mummy to come.