Mega Slowbro Ex
XY Promos · #263/78 · Common · 2013JPN
All 66 Slowbro cards ranked by value →Price history
Loading chart…
Buy it now on eBay
Ad disclosure: As an eBay Partner Network affiliate, CardPrice earns from qualifying purchases — at no extra cost to you.
Loading live listings…
Live from eBay · affiliate links support CardPrice · see recent sold results →
Graded values
Grades 1–6 are estimates modeled from the raw price — PSA/CGC/BGS 7–10 and Ungraded are live tracked market values.
PSA 10 chart is building — graded values are tracked nightly, a new point appears each day.
Graded population census · updated 2026-09-21
Population data from PriceCharting, updated monthly.
More Slowbro cards all 66 ranked by value →
Dark SlowbroLegendary Collection · 2002
Dark SlowbroPokemon Web · 2001
SlowbroAquapolis · 2003
SlowbroFlight of Legends · 2004
SlowbroT Promotional cards · 2002
SlowbroFireRed & LeafGreen · 2004How much is Mega Slowbro Ex #263/78 worth?
Right now (November 8, 2026) the going rate for an ungraded Mega Slowbro Ex #263/78 from XY Promos is about $35.31.
Grading changes the math on this one: a PSA 10 is valued around $195.32, roughly 5.5x the raw price, while a PSA 9 sits near $52.97. 656 copies have been graded to date, and 79% of them came back a 10 — worth knowing before you pay grading fees.
We update this valuation every night from live market data and verify it against real completed sales — see the chart above for how Mega Slowbro Ex has moved over time.