What tool is used to take strollers apart - Safety 1st Acella LX Winnie the Pooh Standard Stroller

Generally strollers are a collection of aluminum rods fitted into plastic supports and locked in with aluminum rivets. Wheels are generally fitted to the axel with capped star locks but have some clip arrangement to remove wheels from the frame for packing down.
Rivets have to be drilled out and replaced with new ones. To flair off the new rivet properly you need a clinch tool & dolly but you can make a less pretty repair with a ball-peen hammer and punch. Capped star locks need to be prized off and will never hold as well again so best replaced. So you need to have some new rivets and capped star locks be for you attempt to dismantle a stroller.