Mewtwo

Items in their inventory when the game ended, across 17 games.

Item	Games	Of all games	Win rate
Blink Dagger	8	47.1%	50.0%
Octarine Core	6	35.3%	83.3%
Lotus Orb	5	29.4%	80.0%
Aghanim's Scepter	5	29.4%	40.0%
Glimmer Cape	4	23.5%	75.0%
Observer and Sentry Wards	4	23.5%	75.0%
Arcane Boots	4	23.5%	75.0%
Ghost Scepter	4	23.5%	75.0%
Black King Bar	4	23.5%	50.0%
Boots of Travel	3	17.6%	100.0%
Scythe of Vyse	3	17.6%	66.7%
Phase Boots	3	17.6%	33.3%
Assault Cuirass	2	11.8%	100.0%
Greater Healing Lotus	2	11.8%	100.0%
Force Staff	2	11.8%	100.0%
Abyssal Blade	2	11.8%	100.0%
Wind Waker	2	11.8%	100.0%
Arcane Blink	2	11.8%	100.0%
Eul's Scepter of Divinity	2	11.8%	50.0%
Yasha and Kaya	2	11.8%	50.0%
Dust of Appearance	2	11.8%	50.0%
Refresher Orb	2	11.8%	50.0%
Magic Wand	2	11.8%	0.0%
Crella's Crozier	1	5.9%	100.0%
Shiva's Guard	1	5.9%	100.0%
Power Treads	1	5.9%	100.0%
Gem of True Sight	1	5.9%	100.0%
Manta Style	1	5.9%	100.0%
Monkey King Bar	1	5.9%	100.0%
Hydra's Breath	1	5.9%	100.0%
Butterfly	1	5.9%	100.0%
Nullifier	1	5.9%	100.0%
Boots of Travel 2	1	5.9%	100.0%
Heart of Tarrasque	1	5.9%	100.0%
Guardian Greaves	1	5.9%	100.0%
Daedalus	1	5.9%	100.0%
Observer Ward	1	5.9%	100.0%
Sentry Ward	1	5.9%	100.0%
Wind Lace	1	5.9%	0.0%
Blood Grenade	1	5.9%	0.0%
Magic Stick	1	5.9%	0.0%
Spirit Vessel	1	5.9%	0.0%
Tranquil Boots	1	5.9%	0.0%
Aether Lens	1	5.9%	0.0%
Blade Mail	1	5.9%	0.0%
Ogre Axe	1	5.9%	0.0%
Bracer	1	5.9%	0.0%
Boots of Speed	1	5.9%	0.0%
Ring of Health	1	5.9%	0.0%
Overwhelming Blink	1	5.9%	0.0%