In this, I will show you how to draw ellipse in solidworks without ellipse command.
Draw a circle of Diameter 100 mm on top plane & Extrude it with a certain dimension Lets say 200 mm.
Draw a inclined profile on front sketch and extruded cut with a mid plane.
see the picture.
Take sketch on Inclined cut plane. And convert entities for outer edges, we get ellipse there.
In the same sketch, click on make block and select converted entities. click ok. block will added to the tree.
save the block with ' save Block" option.
To use this saved block, select the plane to sketch where u require ellipse.
with "Insert block" insert the lock there. if you want to edit you can edit it.