CREATE TABLE table_63663 ("Year" FLOAT, "Game" TEXT, "Genre" TEXT, "Platform ( s ) " TEXT, "Developer ( s ) " TEXT)

What year had Nintendo EAD, Monolith Soft as developers?
SELECT SUM("Year") FROM table_63663 WHERE "Developer(s)" = 'nintendo ead, monolith soft'
SELECT SUM("Year") FROM "table_63663" WHERE "Developer(s)" = 'nintendo ead, monolith soft'