The ornamental design for an inflatablepooltoy, as shown and described.
FIG. 1 is a perspective view of an inflatable pool toy, showing my new design;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a left side view thereof;
FIG. 5 is a right side view thereof;
FIG. 6 is a top plan view thereof; and,
FIG. 7 is a bottom plan view thereof.
The broken line showing of the inflatable pool toy is for the purpose of illustrating portions of the article that forms no part of the claimed design.