Mega Slowbro Ex
XY Promos · #263/78 · Common · 2013JPN
All 66 Slowbro cards ranked by value →Price history
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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.
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SlowbroUnseen Forces · 2005How much is Mega Slowbro Ex #263/78 worth?
Right now (October 17, 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 $195.10, 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.