Back in the day my son was into skylanders and I got him the skylanders themed wiimote and nunchuck. They were both noticeably smaller than official ones. Maybe check ebay/mercari/offerup for one of those?
Edit: still on amazon: https://www.amazon.com/dp/B008RT8602/ref=cm_sw_r_cp_apa_fabc_26ZKAH2JEF1C7ZM13SKY