The Tyros does not have a Wall Wart because it's a multi-voltage keyboard (it can work from 110 to 240 volts without needing a transformer).
(BTW, the same applies to other Yamaha keyboards, like the 9000 pro.)
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Korg Kronos 61 and PA3X-Pro76, Roland G-70, BK7-m and Integra 7, Casio PX-5S, Fender Stratocaster with Fralin pickups, Fender Stratocaster with Kinman pickups, vintage Gibson SG standard.