Yes, fissioning any element would release energy. No, fusing any element would require energy input; it would never release energy.
Work Step by Step
Hypothetically, if the mass per nucleon kept rising with atomic number, all fission reactions would yield nuclei with lower atomic number and less mass per nucleon, releasing energy. On the other hand, all fusion reactions (which increase the atomic number) would result in a nucleus with more mass per nucleon. The process would require energy input.